This is great! Liked the music, and great work on physics for a solo dev in one month :D
Some things I noticed:
- Could infinitely jump if hugging a wall
- A little too slippery/momentum. Would feel nicer if the players stopped moving quicker
- Round end UI at the end of level 1 was way off center
- If you jump into a wall and hold the jump button you'll stay there until you let go
- Jumping off edges needs more 'coyote time', made level 3 super hard