Procedurally generated maps are both the best and worst part of this game. Great because no game is the same twice, not so great because sometimes, you stumble into a really big, bad boss who slaughters you when you aren't the least bit ready to fight one.  Some of the in jokes are pretty funny.  The 8 bit graphics are cute for the most part though sometimes it's hard to tell what something is supposed to be.  A few of the variants on Google Play Store are inprovements over this base game.