Great game.
One of the best uses of particle system I saw. Also, love the indication you get of what you can and can't roll over.
I wanted the snowball to move faster, felt like I was never in danger, even when I got big.
I expected the difficulty to increase because of the size - diifficult to dodge things, but since I got big I just rolled over everything. More solid rock or big houses will fix that, as well as adding more speed.
Great graphics too.
Well done!