Just type 'hellcarrot' on the keyboard and you'll get a bunny each time. Other codes currently in the game are 'frozdy' to toggle flight mode on and off (will probably end up being an epic player item in the end), and you can press the cheat button (default is c) 30 times while standing in range of a portal to spawn one of each demon except the hell bunny but that will also turn off all the rest of the portals on the map so good luck!