On the point of card creation, I also found it to be frustrating. Not as much as you did, but for example I couldn't get a card to say "Destroy this robot unless it moved this turn" even though "moved this turn" is in the dictionary. I guess I can only say "Destroy each robot that moved this turn" - no negation, and not specific. I still enjoyed messing with it, but it was a pretty challenging experience to start coming up with cards that were both interesting and legal.

> It seems I can set an arbitrary cost for my cards? How do you balance the game when it involves custom cards?

> One strategy would be to give each player a deck consisting of their cards and the opponents cards. So if someone made a really imbalanced card, they would have a 50-50 chance of having it used on them.

The author actually addressed this by doing exactly that