Honestly really enjoyed that game, a small metroid-vania with trick shot and platforming puzzles.
But here come the complaints. lol. (not many)
-Your jump sound effect start after you've left the ground.
-The lava caused the game to chug. Slowed it WAY down.
-Your push-able boxes look the same as your non-push-able boxes.
Otherwise, I think it's a pretty solid game.
Good job.