Just finished it myself and… I hope this dev continues with this game. I was actually taken aback with the quality of the animations (for the bit style). I think with appropriate feedback, he could make an amazing game. Good selection of enemies as well. Of course, hitboxes, jumping for the bird, and enemy placement in boss rooms was a bit… frustrating to say the least. Hitboxes and enemy placement are easy fixes but air attacks are going to need an in game power up or an entire sprite set just for them.
overall, I’d add this one to your vault for the animations alone. (bear, bird, and cow, are probably my favorite in no particular order)