William and Sly is a 2D platform game where you play as a fox and the aim is activate 13 runestones to complete the game. You are collecting runestones for your human master. To activate runestones you need to also collect fairyflies, and there are optional mushrooms to collect.
The game has a nice ambient atmosphere and is set in a forest. It is fun exploring the level and finding or unlocking hidden areas. It is a good game for the 30 - 60 minutes its lasts.