Hello,
Great entry! Very solid, I really liked it. As other said, the controls need some improvement, in my opinion particularly the Jump and Double Jump, since I think that the game sometimes misses my inputs.
Boss fight was well constructed too, and level design made the map a pleasure to navigate.
Other than that, the good foundation for a great game is there!
Did you use Godot MetSys?
PD: don't hesitate to try our game! :D