I've tried the game, and it's so much fun, pretty smart for using Korone's Monsters for the Boss in game and my favorite one is Dark Knight Umbrella, and my favorite Gun is X-Potato Cannon. There's bug tho i hope it will be fixed in the next version, i'm looking forward for more Boss, Weapons, and Maps on the next version.
and for advice, it's really hard if just using one health for one run, i suggest to use 3/5 health and players can get heal items in the game, so it will be more fun.
Truly nice game my rate is 8/10