Very nicely done! The pillow mechanics and avoiding your past self are really well designed and do a good job fitting in the theme without sacrificing gameplay. The game feels extremely polished and very fun.
Only thing I'd tweak are the pillow mechanics so that it's easier to jump on a bouncing pillow and to maybe include a button to pick it up if you are around it instead of automatically picking it up.
Overall though, it's incredible you were able to create this game in the time given. Awesome work!