I'm pretty sure that this was the first game I bought on the back of a TV advert, although I can't remember what the advert did apart form show some really funky shots of someone playing the game.
Screwball Scramble was, believe it or not, a kind-of Krypton Factor Assault Course for ball-bearings. Racing against the clock, you had to travel the wobbly bridge, swing out over a river, and jump over logs - all using one tiny button and a handle to control magnets. It was an incredibly clever game, and one that was consistently challenging since you always had the choice of challenging your own best timing.
A couple of years later, Woolworths brought out their own version in their "Chad Valley" range of toys, and I'm quite sure they still sell it. Buy it now!