Despite everything I'm about to type, I still recommend you give the game a go.
The sound effects are terrible. When you die from a moving spike, the spike should not bounce around. Or at least mute the spike's sound effect when this happens, as it gets really annoying when the sound plays again and again rapid-fire. The controls are sluggish. The disappearing platforms sometimes disappear when they aren't supposed to. The first level in the hard section isn't a fun kind of hard, but a sketchy kind of hard that uses a feature the player has no experience with yet. It's basically guesswork.
The game has a lot of potential, and I enjoyed many parts, but the game is just unpolished.