In keeping with the spirit and colorful square theme of this site, here is something both nerdy and cubie. If you have an iphone or ipod touch check out cube runner.
my medium is 18907hard is 1065beat that nika
Here's the nerdy part. Drill down into the cube runner site to find instructions on creating your own levels. Also, check settings for the developer mode. You don't get a score in developer mode, but it's good to practice with it on. I was able to really boost my score after playing with developer mode on for a while.