Redder is a flash game that is all about world exploration. You're a little astronaut stranded in an alien world. The game presents little puzzles that are based on switching green and red blocks that make up the platforms in the world and your main objective is to gather the gems that are scattered around.
The controls are simple, you move with the arrow keys and jump with either 'z' 'shift' 'spacebar' or the 'up' key. You enter the map with 'M'.
The game world is huge, but don't worry, the game keeps track of the last checkpoint you passed through even if you close your browser or turn off your computer. Play it here!