I once tried to make little cards and they came out alright, but yours look much crisper and nicer.  Plus your background and the whole setup looks great!  The character faces are small but they show emotions and are detailed.  It's very well thought out in general.

Very impressive!

5 out of 5 from me plus faved.

Simply fresh,  I like that neon effect on the coins, that remind me some arcade games.
Your caracters icons and background are perfect for me.

Not a pinball machine or anything to do with the Olympics.

Other than that, it looks fairly nice.

.................-_-:

... that's not a pinball machine...

...and why is this submitted to the challenge?

look at nice ... maybe green in corners isn't for that idea, but I like it :)