I personally thought the game had an okay level of difficulty, however, it would be a little less frustrating if there was a checkpoint before the boss. It took me 3 runs after first seeing the boss before finally beating it, so take that as you will.
Viewing post in Phases of Drops jam comments
Thank you very much for the reply..I've got a really cool idea now thanks to your feedback..Initially i didn't add check point as ,if a player was in final phase and hence would just have 1 heart ,if he were to respawn at check point he would consistently respawn in his final phase and would just have 1 heart and that would be very difficult..But now thanks to you i've got an idea of adding something like a collectable hearts during boss fight..Sorry for troubling you by asking questions (>w<) ..And Thank you very much for the feedback..