Simple, difficult
I don't really find this easy nor fun.
The graphics aren't terrible, the background looks okay, but the character could do with some detail. The coins are so bright that they're somewhat difficult to see, and the animation isn't very good or realistic, possibly because the character move so fast.
The gameplay was quite poor. The character moved so fast that it all came down to luck, I just spammed back and forth and got about 200 dollars, never got past the first level.
Make the coins fall slower and the guy run slower, and I believe you have a decent game.