In this game you are the mouse, who wants to cross the roads and the rivers. There are some cars moving on the roads, avoid them! They can run over you. Avoid the rivers, you cannot swim over the rivers, use bridges instead. You must be agile! Good luck!
Warning! When you have finished one level, you can find yourself immediately in the next level and in the middle of a road. Also check out: http://scratch.mit.edu/projects/49057608/