Just when I thought I'd seen all variations of caterpillars running around like demented clockwork mice, here's yet another frantic game, Mad Monty.

In this version, you whizz around a garden eating frogs, mushrooms and toadstools. Every time you eat a frog another toadstool appears. But if you eat the fungi in the wrong order, or if you collide with the garden wall, it's a life lost.

As there's little difference between toadstools and mushrooms - apart from colour - it took me some time to get the energetic little beast to eat in the right order. Instead of getting fatter, the caterpillar grows longer and therefore becomes harder to control.

The mushrooms always appeared close to the wall, and more often than not, despite my frantic finger tapping, the caterpillar just went kamikaze-like straight into it.

There's no joystick option and irritatingly the Break key isn't disabled, so as you use the cursor keys it's easy to stab the wrong button in error. Five speeds are offered, from fast to suicidal.

Gobble up all the frogs and you get promoted to the next level. I only hope all the caterpillars don't hatch out next spring into a rash of The Butterfly Flies Back.