Excellent
Altogether very fun and challenging game. Very nice combination of visual style and music. Even though the concept is pretty simple, there is a strong mood that is created by the artwork and sound, which for me is just as important as the gameplay.
I sometimes found it a little tedious to have to go back and repeat some of the levels if I died. Otherwise, it was a lot of fun.
Look forward to seeing more. And please, the darker the better ;)