I got through half way and changed computers and I have to start over.
Between this and my personal time, I cant let my fingers go through that again.
Regardless it was good. The upgrades are pretty great and really do help. Its a simple idea made insanely hard (but not unwinnable) to play and its fun.
I did find myself saying "screw the falling rocks, Im just not gonna move sideways and book it to the top" and did exactly that the last couple of levels I played.
All in all, I really liked it.