This game has a really good level dwesign, but there are a few problems with the character itself:
1- The lack of momentum makes the more difficult platforming sections a bit more frustrating (also, why doesn't the jetpack respawn when you die?)
2- All the enemies can be defeated the same way (The triangle doesn't look like somebody to jump on the head)
3- The hitboxes should be fixed, it's difficult to jump on a small enemy sometimes
Overall, this game is really fun and being able to play it on the get go is really good, keep making!