It looks like Amazon's throwing a big celebration for their new indie game store and for it are discounting various indie games by up to 75%. Blockland appears to be in this list and is currently 75% ($5) on the Amazon store. I can't find anything stating how long the sale is for (though it looks like it's until June 10th), so I would nab some keys as fast as you can.
Link to Blockland's Amazon PageEDIT:
Blockland is part of the
Indie 10-Game Action Pack. Proceeds from this bundle go straight to the developers.
Blockland's picture also appears on the bottom of the main Indie Store page.EDIT2:
Blockland is up there with a bunch of well known indie games. Why not see if we can't push Blockland's popularity at all?
Recommend the game on reddit. Since a lot of good indie games are on sale, I'm pretty sure this is going to gain a lot of traffic, especially on reddit. With a lot of people asking which games are good in the sale, now is a golden opportunity to get the game out there.
Write a good review for Blockland. More reviews we get here the more people are going to look at the game. For this price, even a quick look can lead to someone buying Blockland.
EDIT3:Official Topic