This should be number one. The implementation of momentum is great (even though my feet look like they are bleeding on the brick) the upgrade system is phenomenal and educational. You really did a great job and I think if you had a webgl version ratings would be pouring in. Though I'm sure that's a limitation of the way you made the game and not lack of desire to have made a web version.
Keep it up.. If this is the quality of work in 7 days maybe I'll be playing your games on steam someday.