In the puzzle platformer Coma you play as Pete, a friendly little creature who is on a search for his missing sister. During your adventure you'll meet other inhabitants of the outside world, some of them requiring your help before returning the favor with an item or a piece of advice.

Nearly everything is controlled using the arrow keys, and the only time you'll have to switch to the mouse is when picking a response during a conversation. Occasionally it can be hard to tell whether certain platforms are tangible or not, and a couple of interactive objects can be tough to spot, but even if you had difficulties with a puzzle or two it still won't take you more than half an hour to beat the entire game. (source: Ethan)