Very good art and music. Overall I think the idea and the theme works. But initially I struggled to understand exactly what I was meant to do.
Once I understood it, I kind of didn't see an end goal? So I can stay alive, and earn coins but then what? If the aim was just for a high score then I feel like it needs to be a little faster paced and coins replaced with something else. It would then need to track high score.
Overall though, good job!