Colour Clash is one of those games that keep you entertained for a long time especially if you like puzzle type games. The objective of the game is to find all the insects located around the level which sounds simple but as you get on to the more advanced levels the game becomes extremely hard. I managed to get on to level 28 if I remember correctly.
This is one of my all time favourite PD games on the ST. The combination of action and puzzlement is truly amazing and if I was to re-write any ST game on the PC, this would be it!