I like minimalistic games like this one, let me know if you keep updating it!
What what was most missing was sfx, it really brings a game to life and it's not that hard to implement.
Some other tips to improve the gameplay:
- coyote jump
- input buffer
- make the jump less floaty
- make the level design a bit more interesting and really thing about it (one of the most essencial and forgotten game aspects)
- maybe zoom out the camera a bit so that the player could know where it needs to go