Not too bad! I think the concept is quite unique and the simple look of the in-game sprites works well with a simple arcade game like this. I think the shop menu would do better with a clearer indicator of how many coins you have (maybe accompany the number in the corner with a dollar symbol or a coin?), some way to tell whether you have enough coins to buy something, and a setting to change the controls for your abilities.
Small graphics critique as well - I'd recommend you redo the text and shop menu, to make it look a bit more polished and coordinated with the rest.
Also, the music seems to be quieter in-game than in the main menu?
After fixing all this, it could definitely become front page material! I'd love to see where this goes from here!