I think conceptually this is a very fun idea. Having to charge your jump just right is cool and not being able to move in mid air really makes it way more challenging lol. With that said I do have a couple of critiques:

1. I think being able to see your characters model would make this more investing. I would love to see your character do a squat when charging the jump.

2. Maybe add some upgrade shops or something? Like shorter charge for your jump, maybe minuscule movement in midair, etc.

Otherwise though this is a fun and simple game, I enjoyed it!

The solid, distilled essence of a rage game. Would have liked to see the sick-looking legs of the character in-game and not just in the cover art!