TAKES WAY TOO LONG TO ADVANCE! This is only a game to play when bored. The supply is always just shy of what you need to advance. There are times when I've played this game for (well u certainly can't play straight through for this long but...) 3 days straight intermittently and still haven't got the item it takes to move to the next level. And that's just sad. I just deleted it so I can focus on games that actually help you get what you need...like "Riverside Merge"