There's nothing really inherently wrong mechanically with the game other than the fact its just... boring. The music is boring, the platforming is boring, the enemies all die in like 2-3 hits. The whole gimmick this game is based off of isn't even used to its max potential. What I expecially don't like is that powerups must be equipped manually, why not just have them all for going out of your way to collect everything? It seems so tedious to run back and forth just because you don't have the powerup needed to access the secret variant of the level.
Yeah just ignore this one