It feels like there's a surprisingly fun and expressive movement system in this game, and it's just itching to be set free. I can't quite get to grips with the controls as they are now, but I would suggest 1) allowing the player to only charge jumps in midair, rather than the space button also forcing them to the ground, and on that note, 2) delegating some actions to other keys than the space bar; I never really understood how the kicking mechanic worked, and if my little frog ever did it, it certainly wasn't on purpose on my end.
Definitely has potential!