Yo this is super fun! Feels really rewarding once you get in a flow. Great soundtrack and graphics too!
The lambs feel like they have too much HP. I almost always lose lives when trying to get them, since you gotta focus purely on the lamb and nothing else. Often losing the perfect score which usually rewards you with a life and 5000 points anyway. It could be nice if killing it would cause an explosion clearing the stage of all enemies, or at least just lowering its HP.
I often get dropkicked by the crows, since they fall in random locations, an indicator at the top of the screen would be very helpful. And having some knockback on them could be nice too. I haven't figured out a nice way to kill them other than just running side to side shooting backwards.
A final minor thing is that it'd be nice to have some coyote time when pressing jump, like it'd still jump once you land if you've pressed the jump button a few frames before. The last sidescrolling levels are really tough! I wish you had a bit more air control, it's very hard to make the jumps while getting swarmed
Amazing work all of you! Gotta try to win the game!!
EDIT2: dang the boss has a lot of health! like way too much in my opinion, I'd lower it and make the boss sort of a reward for getting that far