I really liked how the cannons on day 4 knock you out instead of killing you. That was a nice touch. All of the animation looks super clean and I love the little sound effects to punctuate it.
If you wanted to improve, the platforming felt slightly off at times. I suggest adding features like coyote time (can still jump a few frames after leaving an object) or if the player is holding a key, to immediately preform that action when ready instead of waiting for another input.
Overall nice game!