Short & sweet
Well, it's hard to give you a bad review when I currently have the 6th-highest score of all time. :) I think if you can come up with a "random" level generator, you would actually have something that could sell for $1 on a mobile phone app store. It's easy to learn, it's pretty, and it's short. Of course, it's hard to give anything higher than a 7 to a game that short; gotta save the higher numbers for when you come back with something fully developed.