Cool concept, although I felt hopeless when the light dwindled down and knew I couldn't complete the level. Maybe a reset button to quickly retry. Also, I think it could use a couple more mechanics. It'd be nice if killing the enemies restored some of the light. Having the light change color somehow for different effects might be interesting to explore. The collision detection with spikes isn't very forgiving, or maybe it's the movement that feels slippery. Some indication of the kicking direction would be nice.