Congrats on publishing your first game!! I love the gravity setting and the background music.
Some thoughts about the level design at the beginning is, it would be nicer to leave some buffer in between platform so non-parkour gamer (aka bad gamer aka me) can have some chance to go through with less try. Here is a tutorial that I found really helpful to improve the playing experience for 2d-platform that I would like to share it with you:
Overall great entry!!