The art is so very cute, I love it! Cheri and Shellhound look like plushies, all very cute and emotive! Music is rad as well, didn't get stale at all.
As for the gameplay, Cheri is easy enough to control, but Shellhound was too difficult. Charge attack takes around 5 seconds to charge (too slow), and deals anywhere between 10 and 20 damage for me, in that time, you're better spamming the shot button.