The core mechanic of having the light is pretty neat, but I feel like the supporting mechanics don't work too well. Your levels are all just mazes, which is not particularly fun to play. The spikes give me a reason to keep the light on the player as I move, which you have to do anyway. It would have been interesting if I had to remember the layout of the spikes rather than just keep the light on the player whenever I move. The enemies are way too slow to be relevant.
In terms of doing different mechanics. Perhaps more threatening enemies and some kind of combat? Perhaps a switch that's triggered by the light to force the player to move in darkness?
There's potential in the idea, though!