Me and My Shadow is a free open source puzzle game where the player has to guess how to reach the exit with the help of a shadow that will mimic your moves. On your way to the exit, you will have to jump over spikes, moving blocks, etc. The game comes with over 40 levels with the possibility to create custom ones with the help of the built-in 'Map Editor".
Here is a video trailer of the game:
The official game PPA hasn't yet updated the game to work with Ubuntu 12.10 (Quantal Quetzal) and Linux Mint 14 (Nadia). You can alternatively install it with the following commands:
sudo add-apt-repository ppa:upubuntu-com/games
sudo apt-get update
sudo apt-get install meandmyshadow
Uninstalling Me and My Shadow
To remove Me and My Shadow from your system, issue these commands:
sudo add-apt-repository --remove ppa:upubuntu-com/games
sudo apt-get remove meandmyshadow
sudo apt-get update