Nice, the art, gameplay and music are all satisfying.
Suggestions:
- Some of the balance is off sound design-wise. For example the money "chink" sound can be quieter compared to other sounds. Right now it feels like all of the sounds are at the same volume level and adjusting them would help clarify their importance
- I can't tell if there's a 1-2 sec period of invincibility, sometimes I got easily killed by jumping down and falling on one enemy getting hit multiple times
Good job!