I.T. Kid

Sewer Escape is a climb with one control. Wako the hamster falls, you click him and he bounces, and each bounce takes him higher up the shaft; the power-ups along the way decide how far the next one carries him. Miss the timing and he drops back down the way he came.

It is a GameSheep game by WitchHut, and it is a score chase in the classic bounce-and-climb mould: the height is the score, the sewer keeps producing new things to bounce off, and the whole run is one more click than you managed last time.