Beautiful visuals! You are planning to develop more of this game? I think it is definitely worth it! I think i would want to play game like this!
Maybe as some feedback i would mention that colliders need to be adjusted - then walking bird sometimes doesn't touch the ground. Also maybe some polishing of jump. But it is minor, since it is just short jam game.
P.S. when there is flying animation in the end it looks like swallow, but when walking and jumping it is more like crow or jackdaw.