Bosses are pretty dang hard, but it is much simpler than it seems and once you get the hang of it it is a piece of cake. Also, love the greek mythological reference of Eurydice, Orpheous, Cerebrus, and...Hades??? couldn't tell who the last guy was, otherwise, awesome game, simple yet fun challenging and beatable.
 "Don't Look Back"){kind=icon}
 "Aether"){kind=icon}