A good small game, however, here are a few points you need to consider to make this game super interesting and polished to play -
- Make sure that the player doesn't stick to the walls, looks really odd.
- Improve the controls and the movement mechanics of your game, currently, it doesn't feel that good.
- A basic platformer game should consider coyote time and other such stuff to make it super impactful, so, have a look into that.
- Try changing the art style to something pleasing and minimal if possible.
- The level design could be improved than the current one.