This was fun! The lighting torches mechanic worked really well along with the cats' eyes, and the cat animations are really smooth. I only hit one small issue where you sometimes can't drop down when near the edge of the wooden platforms.
It'd be great with more lighting mechanics like mirrors, cutting ropes to swing lit chandeliers, and enemies that react to lighting (e.g. afraid of the light).
The checkpoint system was also nice and lenient, although I was expecting to only have 9 lives.