Treasures of Montezuma Blitz on the Vita is a free download from PSN. You can play the game several times per day for free, after that, it asks if you want to buy more crystals.

I've been playing this game for like a month now. Playing it about once per day (when I remember). I've just been doing the free daily plays, which usually last about 10 to fifteen minutes. When the free plays run out, and it starts asking for money to continue, I back out of the game. I just look at it as a fun little diversion for 5 or 10 minutes, before I play a beefier Vita game. Just curious if anybody else was playing this.