Easy to play, hard to get orbs (but possible) and really hard to die (at least on purpose). The sound effects work well, but I would have liked a bit more music (although it seems the sound effects themselves can become music, if you time the picking-up-orbs right, but they don't come up very often, it seems). I think it would have been fun if there were more types of enemies though, I got bored after a while. But the art looked fun.