It took me quite a while to realize that pointing to hidden devils is controlled by the mouse rather than the position of the character. The controls and movement mechanics are functional but not great, the player felt floaty and was hard to control accurately. He also did slide off slopes. It fits the theme pretty well and the graphics are neat, you've clearly spent a lot of time on them. The only sound effect got repetitive very fast and music was missing entirely.
Finding all the devils was fun but a bit more content would've been great.