If anyone out there is a die-hard Super Monkey Ball fantic (or any other game involving rolling balls), I'm sure you'll get an immense kick out of Tiny Lab Productions' latest upcoming concept Orborun. It's a game where you do nothing more but steer a ball down a slope as it moves automatically. It does pose a great challenge and I find myself rocking back and forth just racing down the tracks.
You can try out Orborun's ten-level flash demo on Newgrounds, or download betas on other platforms at the Orborun IndieGoGo page. I'm sure you'll have a blast.