Fun idea, I definitely see the Vampire Survivors influence! It took me a bit to realize the yellow swipe was my attack, so I think you should add some affordances to make that more clear to the player. And there were a few issues that could use some polish: the timer seemed to have stopped after 1 minute, it wasn't completely clear when enemies were doing damage, and the power up explanation box continuing to pop up was unnecessary. But after ironing out these issues and adding some more mechanics, this could be a lot of fun!