About Same Game
Well even though it's minimalistic it still can addict you for a couple of hours to spend. Pretty good tool to spend some time having a break from everyday issues.
And it's really simple: tap group of 2 or more tiles of the same color and make them go! Then do it all over again. Oh... this vicious cycle of addiction...
(In fact I'm still playing it right now with one hand while writing this description.)
Made with LibGDX.