The fighting felt pretty fun and I enjoyed the beat 'em up style while also dodging the enemies/projectiles. The spooky vibe and art style does set the tone nicely. :>
As the previous comments already mentioned tho, more communication to the player would be neat. It wasn't exactly clear what the goal is or what each individual upgrade does.
But I could imagine the game being a blast with more enemies with different behaviours as well as some weapons or special moves. ^^