The game abuses OpenGL.
The current version of the game will not run on OS X older than 10.9 because they now use some advanced features of OpenGL that will lock up the graphics card on older versions of OS X. Their official workaround is "upgrade to 10.9".
They upgraded to OpenGL 2.1, which is available since 2006. Previously they were using OpenGL 1.1.
FDroid is better than any "store."
Doesn't have facebook, flickr, netflix, etc. Pretty useless...
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