Managed to beat the boss, some notes:
- Audio is quite loud out of the box, could tone it down like 20%
- The player jump height changing unexpectedly doesn't feel very good (level 1 and 2 have different heights I think)
- The flying dude is REALLY hard to avoid because he doesn't collide and the player does.
- The ground dudes are relatively fun to try to bait into a hole
Otherwise, fun game, enjoyed the 4 attempts it took me to get to the boss. Great job!