Hard enough to have fun.
I see big potential in this one, few games use the concept of dying as the main gameplay (no, seriously, think on any (? )
As a fan of puzzles myself I found this great and multitasking, two controlls at once reminds me of marisa & alice trap tower.
A little more desing in sprites and backgrounds, less anoying tutorial signs obstructing your sight, more item interaction and you have a hell of a game!