I played through all the characters to see all the pictures you drew ;) It was probably easiest with the first one because you can just jump over the whirlpool, and you don’t really need to attack anyone; they manage to lose on their own. One downside is that sometimes it's hard to tell which character you are controlling, especially after respawning. Also, it seems like the fourth girl has a cold; she constantly sneezes 🙂. 

Pretty well-made game, felt good to play.  I would love to see an endless mode of sorts where there's more and more enemies that spawn. The characters should have an explanation in game.