It takes a little practice but you can come up with some pearler balls and lots of wickets. Aim it so that it will swing onto the wickets. The computer is completely unable to score off it, and more often than not gets bowled. Best to use a faster ball, as it is harder to score, but it works with a slower ball as well. Use as much swing as you can, and aim it at the wickets, pitched up but not yorker length.
Computer struggles to play it at all.
This is more fun than the other, as it is possible to get a nick or an LBW as well as a bowled, though it gives away more runs. Make sure that the ball is always aimed short of the cone. It is best not to swing it into a human, as it is easy to play a widish on drive. Bowl a faster ball using the top left arrow. Aim it in-between the end of the cone and the batsman's feet so it will swing onto the wickets.