Well, all of us found some interesting things like:
1.If you use the command teleport 1 1 1 while on the 'falling' scene there is a chance that the stars effect might stay while you play the game.
2.You can actually set your stats to negative(set damage -100 for example) and some interesting things might happen .
3.If you type "spawn monster" you can spawn a thing that crash your game when you kill it(more information can be found on the wiki).
There is a few more interesting things you can do with the commands but i don't want to spoil too much and possibly ruin the fun of finding these yourself.
so yeah.. fun game.