I love Yoshi! I remember playing Yoshi's Story quite a bit. The Yoshi Touch and Go is a great little game for quick playing - but it really is too short.
There are two basic modes. In the first mode, Baby Mario is floating downwards through the sky. He floats down in the top screen - and you see what is beneath him in the lower screen. You use the stylus to build a cloud stairway in essence for him to float down - aiming him at the coins, keeping him away from the enemies. You can draw cloud-circles around enemies to turn them into coins. It's a fairly short fall - only a few minutes - but it's fun to balance the enemy-circling and the slide-creating.
Once Mario is on the ground, he's in on essence a "runaway Yoshi" - a Yoshi that plows right, no matter what is in his way. If there's a ditch, he'll simply jump in! Yoshi isn't very bright :) Your job as the Fairy Guardian is to draw cloud bridges, cloud stairs, cloud ramps, etc. to make sure that Yoshi's path is safe. Again, you draw circles around the enemies, and now you also can point at items in the sky to shoot them down with eggs.
The game is a great deal of fun, and nicely non-violent for kids. You can replay the levels to work on your point count and try to get the highest score. But the problem is that this is literally all there is to the game. I'd love to have FAR more levels ... to have secret levels ... to have worlds you move between. Surely, for the price of the game, they could have given us far more to do! I feel like I'm playing the demo version of a real game, but that really is all there is TO the game.
So while I am thrilled with what I got, I really think they should have given us more. Once they got this cool engine designed, how hard could it have been to crank out 10 or 20 different worlds for us to go through, with different colors, themes, etc?
Yoshi Touch and Go Walkthrough
Buy Yoshi Touch and Go from Amazon