boss is well telegraphed but the invincibility during the lazer attack feels unnecessary, you are just waiting for the boss to finish shooting so you can do something
the mode change felt a bit unnecessary since it didn't differ enough from the frog mod, or rather the frog mode feels unjustified when crow mode has all and more (apparently at least)
cool visuals and sounds
also when presenting the controls to the player a more organised view would be better