Q.u.b.e

Q.U.B.E. is a really awesome game, based off of blocks that you can manipulate with what looks like Telekinesis.  Before you go thinking that this is just Minecraft all over again, know this:  It is actually a challenging puzzle game similar to Portal (only without the portals).  Your goal is basically to get through the levels and escape the facility. There are no enemies but logic.  You can buy the epic game for $9.99 from Steam HERE.

I should probably also mention that it's very GPU reliant, so if you don't have a good GPU, just turn off the anistropic filter and antialiasing and you should be fine.

It really is a great game and the puzzles are fun