I absolutely love the cover art!!
Nice concept for a game, I think the mechanics implemented have the potential to be quite fun and just need a bit of tweaking to get there. A bit more feedback for when the player gets hurt, like a sound or a particle effect of some sort, would be really helpful in communicating what is happening.
I experienced a lot of UI issues, like money not really updating. With more time I'm sure you can polish it up a lot if you like!