Now, this is the bread and butter of this game. TightWire is a fully accelerometer-controlled iPhone game. You try to balance the man as he walks on the tightwire by tilting your iPhone at the right direction at the right time. Tilting your iPhone too much will easily cause him to fall to the ground. Tilting your iPhone less might actually do the trick but it will also cause him to build up some weight and eventually cause him to fall. There's really no right or wrong way of achieving balance. I guess it's all about luck.
To vary the man's walking phase you either tilt your iPhone upwards or downwards. Tilting your iPhone upwards make him walk slower, while tilting your iPhone downwards make him walk faster. Unfortunately, making him walk faster will not help in successfully crossing the TightWire.