There's a lot to like in this. The use of mouse control for lighting was neat but also adds a new level of challenge. The production values were great, with how the camera would provide an intro to the levels and all the funny death sounds. That being said, I think the intro scene for levels should probably only happen the first time. With a game like this, having a quick restart to jump back into the challenge keeps things motivating.
Thank god for double jump though, eh?