I found 2 platforms. I think that a game should try to be fun before trying to be hard and reward the player for mastering the mechanics and not the map. The art is great though.
It also took a while to know that the game was just invisible platforms, and they really aren't that much fun if they are the only way of progressing.
I think in a hard game, you should know where you're supposed to go but getting there is hard.