Get greedy and eat as much of the screen as you can possibly eat. You can not cross over any spaces created by eating previous numbers so you might have to think a little and you might not actually want to get down right greedy.
To install it on pcDuino Ubuntu, run:
$sudo apt-get install greed
Arrow Keys: Move ?: Help Ctrl + C , type " y" to quit game
Start greed game :
Full screen play game , just switch to command line
Press Ctrl + Alt + F1 #greed