diff --git a/client/client_world.ts b/client/client_world.ts
index f019092..ad769c9 100644
--- a/client/client_world.ts
+++ b/client/client_world.ts
@@ -2,7 +2,6 @@ import { World } from "$/common/ecs/mod.ts";
 import { MovementSystem } from "$/common/systems/movement_system.ts";
 import { RenderSystem } from "$/client/systems/render_system.ts";
 import { PlayerControlsSystem } from "$/client/systems/player_controls.ts";
-import { DebugUI } from "$/client/debug_ui.ts";
 import { DebugSystem } from "$/client/systems/debug_system.ts";
 import { InventorySystem } from "$/client/systems/inventory_system.ts";
 import { UIInteractionSystem } from "$/client/systems/ui_interaction_system.ts";
@@ -34,8 +33,6 @@ export class ClientWorld extends World {
 			event.preventDefault();
 		});
 
-		//DebugUI.initialize(this.ctx);
-
 		start_game(this);
 
 		// Logic systems
@@ -49,7 +46,7 @@ export class ClientWorld extends World {
 
 		// render systems
 		this.add_system(new RenderSystem(), "game");
-		this.add_system(new DebugSystem(), "*");
+		this.add_system(new DebugSystem(), "game");
 		this.add_system(new UIRenderSystem(), "main_menu");
 		this.add_system(new UIRenderSystem(), "paused");
 	}
diff --git a/client/debug_ui.ts b/client/debug_ui.ts
index 194d913..ba99624 100644
--- a/client/debug_ui.ts
+++ b/client/debug_ui.ts
@@ -1,6 +1,6 @@
 import { point_inside_rec } from "$/common/utils.ts";
 import { InputManager } from "$/client/input_manager.ts";
-//import { draw_text, measure_text } from "$/client/text_rendering.ts";
+import { begin_clip, draw_rect, draw_rect_stroke, draw_text, end_clip, measure_text } from "./renderer.ts";
 
 const HEADER_HEIGHT = 24;
 const RESIZE_SIZE = 12;
@@ -28,8 +28,6 @@ interface TextInputState {
 }
 
 export class DebugUI {
-	static ctx: CanvasRenderingContext2D;
-
 	static windows = new Map<string, WindowState>();
 	static current_window: WindowState | undefined = undefined;
 
@@ -43,10 +41,6 @@ export class DebugUI {
 	static cursor_y = 0;
 	static content_width = 0;
 
-	static initialize(ctx: CanvasRenderingContext2D) {
-		this.ctx = ctx;
-	}
-
 	static begin(title: string, x: number, y: number, width = 300, height = 300) {
 		let win = this.windows.get(title);
 		if (!win) {
@@ -122,39 +116,33 @@ export class DebugUI {
 		win.scroll_y = Math.max(0, Math.min(win.scroll_y, max_scroll));
 
 		// render
-		this.ctx.save();
+		draw_rect(win.x, win.y, win.width, win.height, [25 / 255, 25 / 255, 25 / 255, 0.95]);
 
-		// transparent background
-		this.ctx.fillStyle = "rgba(25,25,25,0.95)";
-		this.ctx.fillRect(win.x, win.y, win.width, win.height);
+		draw_rect_stroke(win.x, win.y, win.width, win.height, [170 / 255, 170 / 255, 170 / 255, 1]);
 
-		this.ctx.strokeStyle = "#aaa";
-		this.ctx.strokeRect(win.x, win.y, win.width, win.height);
+		draw_rect(win.x, win.y, win.width, HEADER_HEIGHT, [0x33 / 255, 0x33 / 255, 0x33 / 255, 1]);
 
-		// header and title
-		this.ctx.fillStyle = "#333";
-		this.ctx.fillRect(win.x, win.y, win.width, HEADER_HEIGHT);
-
-		//draw_text(this.ctx, title, win.x + 8, win.y + 4, 2);
+		draw_text(title, win.x + 8, win.y + 4);
 
 		// resize grip
-		this.ctx.fillStyle = hovering_resize ? "#888" : "#666";
-		this.ctx.fillRect(
+		draw_rect(
 			win.x + win.width - RESIZE_SIZE,
 			win.y + win.height - RESIZE_SIZE,
 			RESIZE_SIZE,
 			RESIZE_SIZE,
+			hovering_resize ? [88 / 255, 88 / 255, 88 / 255, 1] : [66 / 255, 66 / 255, 66 / 255, 1],
 		);
 
 		// clip it !
-		this.ctx.beginPath();
-		this.ctx.rect(
-			win.x,
-			win.y + HEADER_HEIGHT,
-			win.width,
-			win.height - HEADER_HEIGHT,
-		);
-		this.ctx.clip();
+		begin_clip(win.x, win.y + HEADER_HEIGHT, win.width, win.height - HEADER_HEIGHT);
+		// this.ctx.beginPath();
+		// this.ctx.rect(
+		// 	win.x,
+		// 	win.y + HEADER_HEIGHT,
+		// 	win.width,
+		// 	win.height - HEADER_HEIGHT,
+		// );
+		// this.ctx.clip();
 
 		// move cursor_x to match the windows x and add some padding
 		// same idea for cursor_y but with scrolling
@@ -176,9 +164,9 @@ export class DebugUI {
 
 		this.#draw_scrollbar();
 
-		this.ctx.restore();
-
 		this.current_window = undefined;
+
+		end_clip();
 	}
 
 	static advance(height: number) {
@@ -191,17 +179,13 @@ export class DebugUI {
 	}
 
 	static separator() {
-		this.ctx.strokeStyle = "#555";
-		this.ctx.beginPath();
-		this.ctx.moveTo(this.cursor_x, this.cursor_y);
-		this.ctx.lineTo(this.cursor_x + this.content_width, this.cursor_y);
-		this.ctx.stroke();
+		draw_rect(this.cursor_x, this.cursor_y, this.content_width, 1, [55 / 255, 55 / 255, 55 / 255, 1]);
 
 		this.cursor_y += PADDING * 2;
 	}
 
 	static text(content: string) {
-		//draw_text(this.ctx, content, this.cursor_x, this.cursor_y, 2);
+		draw_text(content, this.cursor_x, this.cursor_y);
 		this.advance(20);
 	}
 
@@ -214,14 +198,10 @@ export class DebugUI {
 		const mouse = InputManager.get_mouse_position();
 		const hovered = point_inside_rec(mouse.x, mouse.y, x, y, width, height);
 
-		this.ctx.fillStyle = hovered ? "#666" : "#444";
-		this.ctx.fillRect(x, y, width, height);
+		draw_rect(x, y, width, height, hovered ? [66 / 255, 66 / 255, 66 / 255, 1] : [44 / 255, 44 / 255, 44 / 255, 1]);
+		draw_rect_stroke(x, y, width, height);
 
-		this.ctx.strokeStyle = "white";
-		this.ctx.strokeRect(x, y, width, height);
-
-		this.ctx.fillStyle = "white";
-		//draw_text(this.ctx, label, x + 6, y + 4, 2);
+		draw_text(label, x + 6, y + 4);
 
 		this.advance(height + PADDING);
 
@@ -242,18 +222,14 @@ export class DebugUI {
 		const mouse = InputManager.get_mouse_position();
 		const hovered = point_inside_rec(mouse.x, mouse.y, x, y, size, size);
 
-		this.ctx.fillStyle = "#222";
-		this.ctx.fillRect(x, y, size, size);
-		this.ctx.strokeStyle = "white";
-		this.ctx.strokeRect(x, y, size, size);
+		draw_rect(x, y, size, size, [22 / 255, 22 / 255, 22 / 22, 1]);
+		draw_rect_stroke(x, y, size, size);
 
 		if (value) {
-			this.ctx.fillStyle = "white";
-			this.ctx.fillRect(x + 4, y + 4, size - 8, size - 8);
+			draw_rect(x + 4, y + 4, size - 8, size - 8);
 		}
 
-		this.ctx.fillStyle = "white";
-		//draw_text(this.ctx, label, x + size + 6, y, 2);
+		draw_text(label, x + size + 6, y);
 
 		this.advance(size + PADDING);
 
@@ -284,18 +260,14 @@ export class DebugUI {
 			value = min + (max - min) * Math.min(Math.max(t, 0), 1);
 		}
 
-		this.ctx.fillStyle = "#333";
-		this.ctx.fillRect(x, y, width, height);
+		draw_rect(x, y, width, height, [0x33 / 255, 0x33 / 255, 0x33 / 255, 1]);
 
 		const percent = (value - min) / (max - min);
-		this.ctx.fillStyle = "#0a84ff";
-		this.ctx.fillRect(x, y, width * percent, height);
+		draw_rect(x, y, width * percent, height, [10 / 255, 132 / 255, 255 / 255, 1]);
 
-		this.ctx.strokeStyle = "white";
-		this.ctx.strokeRect(x, y, width, height);
+		draw_rect_stroke(x, y, width, height);
 
-		this.ctx.fillStyle = "white";
-		//draw_text(this.ctx, `${label}: ${value.toFixed(2)}`, x + 5, y + 2, 2);
+		draw_text(`${label}: ${value.toFixed(2)}`, x + 5, y + 2);
 
 		this.advance(height + PADDING);
 
@@ -308,14 +280,11 @@ export class DebugUI {
 		const y = this.cursor_y;
 		const width = this.content_width;
 
-		this.ctx.fillStyle = "#333";
-		this.ctx.fillRect(x, y, width, height);
+		draw_rect(x, y, width, height, [0x33 / 255, 0x33 / 255, 0x33 / 255, 1]);
 
-		this.ctx.fillStyle = "#366992";
-		this.ctx.fillRect(x, y, width * value, height);
+		draw_rect(x, y, width * value, height, [54 / 255, 105 / 255, 146 / 255, 1]);
 
-		this.ctx.strokeStyle = "white";
-		this.ctx.strokeRect(x, y, width, height);
+		draw_rect_stroke(x, y, width, height);
 
 		this.advance(height + PADDING);
 	}
@@ -405,27 +374,33 @@ export class DebugUI {
 		}
 
 		// draw box
-		this.ctx.fillStyle = is_active ? "#555" : "#333";
-		this.ctx.fillRect(x, y, width, height);
+		draw_rect(
+			x,
+			y,
+			width,
+			height,
+			is_active ? [55 / 255, 55 / 255, 55 / 255, 1] : [0x33 / 255, 0x33 / 255, 0x33 / 255, 1],
+		);
 
 		// highlight
-		this.ctx.strokeStyle = is_active ? "#0a84ff" : "#aaa";
-		this.ctx.strokeRect(x, y, width, height);
+		draw_rect_stroke(
+			x,
+			y,
+			width,
+			height,
+			is_active ? [10 / 255, 132 / 255, 1, 1] : [0xaa / 255, 0xaa / 255, 0xaa / 255, 1],
+		);
 
 		const text_x = x + 6;
 
-		//draw_text(this.ctx, state.value, x + 6, y + 4, 2);
+		draw_text(state.value, x + 6, y + 4);
 
 		// caret !
 		if (is_active && state.show_caret) {
 			const before_text = state.value.substring(0, state.caret);
-			//const caret_x = text_x + measure_text(this.ctx, before_text, 2);
+			const caret_x = text_x + measure_text(before_text);
 
-			this.ctx.strokeStyle = "white";
-			this.ctx.beginPath();
-			//this.ctx.moveTo(caret_x, y + 4);
-			//this.ctx.lineTo(caret_x, y + height - 4);
-			this.ctx.stroke();
+			draw_rect(caret_x, y + 4, 1, height - 4);
 		}
 
 		this.cursor_y += height + PADDING;
@@ -464,24 +439,22 @@ export class DebugUI {
 			return;
 		}
 
-		const scrollbarWidth = 6;
-		const x = win.x + win.width - scrollbarWidth - 2;
+		const scrollbar_width = 6;
+		const x = win.x + win.width - scrollbar_width - 2;
 		const y = win.y + HEADER_HEIGHT;
 		const h = content_visible_height - 24;
 
 		const ratio = content_visible_height / win.content_height;
-		const thumbHeight = h * ratio;
+		const thumb_height = h * ratio;
 
-		const maxScroll = win.content_height - content_visible_height;
-		const thumbY = y + (win.scroll_y / maxScroll) * (h - thumbHeight);
+		const max_scroll = win.content_height - content_visible_height;
+		const thumb_y = y + (win.scroll_y / max_scroll) * (h - thumb_height);
 
 		// track
-		this.ctx.fillStyle = "#222";
-		this.ctx.fillRect(x, y, scrollbarWidth, h);
+		draw_rect(x, y, scrollbar_width, h, [0x22 / 255, 0x22 / 255, 0x22 / 255, 1]);
 
 		// thumb
-		this.ctx.fillStyle = "#888";
-		this.ctx.fillRect(x, thumbY, scrollbarWidth, thumbHeight);
+		draw_rect(x, thumb_y, scrollbar_width, thumb_height, [0x88 / 255, 0x88 / 255, 0x88 / 255, 1]);
 	}
 
 	static #handle_text_editing(state: TextInputState) {
diff --git a/client/renderer.ts b/client/renderer.ts
index f2fbed2..b4d1ed6 100644
--- a/client/renderer.ts
+++ b/client/renderer.ts
@@ -27,6 +27,7 @@ let resolution_loc: WebGLUniformLocation | null;
 let _texture_loc: WebGLUniformLocation | null;
 
 let current_texture: WebGLTexture | null = null;
+let white_tex: WebGLTexture | null = null;
 
 const vertex_src = `
 attribute vec2 aPos;
@@ -134,6 +135,8 @@ export function init_window(canvas_element: HTMLCanvasElement) {
 
 	gl.enable(gl.BLEND);
 	gl.blendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA);
+
+	create_white_texture();
 }
 
 function create_shader(type: number, src: string): WebGLShader {
@@ -315,6 +318,39 @@ function push_quad(
 	}
 }
 
+export function draw_rect(
+	x: number,
+	y: number,
+	w: number,
+	h: number,
+	color: [number, number, number, number] = [1, 1, 1, 1],
+) {
+	if (current_texture !== white_tex) {
+		flush_batch();
+		current_texture = white_tex;
+	}
+
+	push_quad(x, y, w, h, 0, 0, 1, 1, color[0], color[1], color[2], color[3]);
+}
+
+export function draw_rect_stroke(
+	x: number,
+	y: number,
+	w: number,
+	h: number,
+	color: [number, number, number, number] = [1, 1, 1, 1],
+	thickness: number = 1,
+) {
+	// top
+	draw_rect(x, y, w, thickness, color);
+	// bottom
+	draw_rect(x, y + h - thickness, w, thickness, color);
+	// left
+	draw_rect(x, y, thickness, h, color);
+	// right
+	draw_rect(x + w - thickness, y, thickness, h, color);
+}
+
 export function resize_canvas() {
 	const width = self.innerWidth;
 	const height = self.innerHeight;
@@ -341,6 +377,32 @@ export function end_mode_2d() {
 	camera = default_camera;
 }
 
+function create_white_texture() {
+	const tex = gl.createTexture();
+	gl.bindTexture(gl.TEXTURE_2D, tex);
+	const white_pixel = new Uint8Array([255, 255, 255, 255]);
+	gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, 1, 1, 0, gl.RGBA, gl.UNSIGNED_BYTE, white_pixel);
+
+	gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
+	gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
+	gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
+	gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
+
+	white_tex = tex;
+}
+
+export function begin_clip(x: number, y: number, width: number, height: number) {
+	gl.enable(gl.SCISSOR_TEST);
+
+	const flipped_y = canvas.height - (y + height);
+
+	gl.scissor(x, flipped_y, width, height);
+}
+
+export function end_clip() {
+	gl.disable(gl.SCISSOR_TEST);
+}
+
 // font stuff
 
 let font_texture: Texture;
@@ -452,3 +514,16 @@ export function draw_text(str: string, x: number, y: number, scale: number = 1,
 		x += glyph.xadvance * scale;
 	}
 }
+
+export function measure_text(str: string, scale: number = 1) {
+	let x = 0;
+	for (const ch of str) {
+		const glyph = font_fnt.chars[ch.charCodeAt(0)];
+		if (!glyph) {
+			continue;
+		}
+
+		x += glyph.xadvance * scale;
+	}
+	return x;
+}
diff --git a/client/systems/debug_system.ts b/client/systems/debug_system.ts
index eba9964..31044c2 100644
--- a/client/systems/debug_system.ts
+++ b/client/systems/debug_system.ts
@@ -12,9 +12,6 @@ export class DebugSystem extends System {
 			return;
 		}
 
-		DebugUI.ctx.save();
-		DebugUI.ctx.resetTransform();
-
 		DebugUI.begin("Entities", 10, 10, 300);
 
 		for (const entity of world.get_entities()) {
@@ -28,7 +25,6 @@ export class DebugSystem extends System {
 		}
 
 		DebugUI.end();
-		DebugUI.ctx.restore();
 	}
 
 	// deno-lint-ignore no-explicit-any
@@ -52,6 +48,8 @@ export class DebugSystem extends System {
 					key,
 					component[key],
 				);
+			} else if (Array.isArray(component[key])) {
+				DebugUI.text(`${key}: ${JSON.stringify(component[key].slice(0, 10))}`);
 			} else {
 				DebugUI.text(`${key}: ${JSON.stringify(component[key])}`);
 			}