Change how ticking works

client/level/client_level.ts

@@ -123,9 +123,10 @@ export class ClientLevel {
 		this.entities.delete(id);
 	}
 
-	tick(delta: number) {
+	tick() {
 		for (const entity of this.entities.values()) {
-			entity.tick(delta);
+			entity.save_previous_position();
+			entity.tick();
 		}
 	}