Game jams really give us quite excellent games. One of them is this little gem over here.
The idea is to guide your character around the screen, grab another small character and head back to the start. But you can't walk, jump or anything else like that to move around; your character's legs can stretch out (not ad infinitum, there's an upper limit to this) into any direction you like (and indeed you can change direction at will) until they reach grass. Then the rest of the body will travel where the traveling leg arrived and then the other leg will do the same. Of course there are obstacles to avoid, which makes timing essential.
A really refreshing concept which I suggest you try :).