Great game but you Need an undo!

I really really like this game but would LOVE it if there was an "undo" key. Id settle for a "replay" key

Often enough when playing I make a move that had unforeseen consequences and I end up blowing a strategy i had planned. In these instances Id love to have a chance to take the move back or at least try the whole board over again.

In addition, occasionally my finger slips while trying to find a good word and I end again blowing a great opportunity.

Fix this and the game will be perfect!

Crasms about SpellTower, v3.1.3