Once you play on facebook, you never turn back. Why? you ask? The time upgrades are SHORTER. 1 minute for the first upgrade... 2 mins for the second... IT'S A CHRISTMAS MIRACLE!!
This game is like a 'level pack' of sorts. On facebook there are over 10 maps and 20 characters, with more upgrades and different enemies. There's you explanation for the crappiness of this game- it's not REALLY a game.
The game will only build the 'best' type buildings, level 4's and not level 3's, if it can, so if you want to build houses then either wait a long time to unlock the idle achievement or somehow manage to NOT unlock the other level 4's. Also, the class tree will only work if you have the first thing in each column activated. For example, if you only activate 'Farmer' then nobody will become a Farmer because they cannot become a Scavenger. It's like evolution. 5 stars for the game BTW!