This is a good concept for a GB styled game. But I think couple of things I suggest to might improve in the game. I think you should add more different variations of balloons like say bigger balloon that spits out 5 coins out for example. It might get repetitive to hit all the same balloons for the 2,000 coins. Also, you should add an copy button (I forgot the term) to have X/Square Button on Xbox/PS Controller to make the cursor click. Also, I think this one is bit nitpick, I think you should have the cursor move at the screen with the D Pad instead of going for platformer style.