A simple idea but a novel, fun and difficult game. You control a sheepdog called Rex (who looks like a black trestle table) whose task it is to herd a number of errant sheep back into their pen. Sheep may be lost in a river, or may wander into crops and eat them. Points are lost for both of these. Rex will also damage crops if he passes through them.
I found the control keys too close together for comfort but the more nimble-fingered may have no problem. There's an option for joystick control, but as the game is mainly in Basic it does not have the speed which makes joysticks a must.
Handling Rex is a matter of very precise judgement, quite hard to achieve. But with practice the game might pall - there are no higher skill levels as you get better.