This is a German game. You are a little orange square on the screen and, every time you get a cabbage, you grow a square longer. Beware if you bump into a poisonous mushroom - you'll disintegrate. After you have eaten so many cabbages you have the chance to eat a blue cross which gives bonus points from 1 to 9.
If you eat a special cross then you can go after the mushrooms for a short while. If you hit yourself, or the boundaries, you explode.
I think Fuss is a really good game. It's very fast and reacts quickly to the keys, which are the arrow keys. Simple but brilliant!
It runs on any Colour Genie.