I honestly didn't find this to be that bad. I think the best part is probably how great the coins look as they fall to the ground. I don't know why I'm a fireball or why the Nyan cat is dropping coins. I may be one of the few people who didn't give this a negative review. Well, I gave a mediocre review at least. This could use a lot more sounds and some music.
I just think you need to have more going on in your game. The Nyan cat seems to move unsteadily in this game, but that may have been part of the point. It was a little fun to collect all those coins. Some of it is unsteady, so you might want to check into that. It looks like two of them show up after awhile.