Gridland is played like a match three-style game (such as Bejeweled), but in a Minecraft-like setting. During the day, amass resources to build your town. At night, the tiles become weapons you’ll need to fend off monsters:

You can play it for free in your browser. (I’m stuck on day 6.)
Via Waxy
We had this posted about a month ago.
And I’m still effing addicted and boot it up occasionally.
Yeah, played it after the first time it was posted. Was hard till i figured out how to skip nights then it was a cake walk to the dragon and final glory.