go to game settings when in the game lobby and set everything to faster.

at least in single player you may change the speed up to 8x by pressing the little "+" button at the bottom of your HUD (where the entity symbol and the scuttle button is)

1. Set all game settings to Faster when starting a game

2. If on single-player, press the - and = buttons to decrease and increase game speed

3. Play online, all games on ICO often seem to go something like twice as fast as normal single-player, I think due to lag