"Temple Of Tangram" is a small puzzle game that was recently ported to Linux (also runs on Windows and Mac OSX). Unfortunately the game is not open source but it's free to play and includes 50 levels. You can also buy 250 additional levels for 4 euro.
At first the game seems pretty easy but as you advance you'll notice it gets more and more difficult so if you're into puzzle games, give it a try!
Check out this video to get a better idea about Temple Of Tangram:
Download Temple Of Tangram (to play it on Linux, simply extract the archive and double click the extracted "TempleOfTangram" file).
See also: Install Zaz (Zuma Like Game For Linux And Windows) 0.8.0 In Ubuntu
Thanks to Jochen Heizmann for the tip!