Really fun, a vampire survivor like in a 3d arena. Didn't see the mode, but there was a Big in there, so my friend mikey liked it.
Small suggestions would be making enemies have one hit to die until that first level up, many won't see it at this difficulty. Another would be the game slows down hard if you don't kill enough enemies in the first 3-4 mins. Limiting enemies spawned or max enemy bullets would make the game playable for much longer