Here's a Sokoban ("box pusher") clone called Star Pusher. I've used the graphics from the Planet Cute collection. You'll need Python (2 or 3) and Pygame installed to run it. Just download and unzip the files to the same directory. It comes with 201 levels from David W. Skinner. Download the source code and graphics. (UPDATE: I've updated the code so that it works on Linux. It was due to a \r\n new