Such a cool double-interpretation of the theme! I liked how both forms had advantages and dissadvantages (you can glide faster as a bat but you can't wall jump), and I also liked the checkpoint mechanic and deciding if it was worth it to use your precious time to be able to restart faster in a difficult section. For some feedback, while the optional challenges were really fun to complete if you went out of your way, I wish there was a bit more mandatory challenge as well, especially in the level with all the time doors. But other than that, this a very fun and polished platformer, great work on this!