To Poke, click as many times as you can before time runs out.
To Charge, click and hold while the charger gets as close to 0 as possible (without going over).
To Push, click as soon as the timer starts running.
Get combos by winning 3 or more mini-games in a row....or by losing 3 or more mini-games in a row.
If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).