The idea of this game was pretty interesting and it was overall quite fun. Here's some ways it could be improved:
1. Visuals: The player character is pixel art, but the rest of the game is not. This looks visually inconsistent, so when you use assets from the internet, make sure that they stylistically fit with each other.
2. It was initially unclear to me that double pressing q and e would flip gravity 180 degrees, so I got stuck on a level for a while. It would be nice if the tutorial explained that.
3. The random holes in the ground that would open up and kill you are annoying and feel unfair. If the intention is not to infuriate the player, then the holes should at least be marked so that you can expect them.