problem with APK publishing

hi guys , i have finished my game programing , it,s a tank game and 25MB gor android .
i uploaded it on google play store and every thing was perfect,put i face one problem and i cant resolve it never from 5 days :((
the problem that my game is compatiple only with 2180 devices from more than 6000 devices .
help me please you are my last hope , and sorry for my english .

Each GPU has it’s own texture compression format and that is why your game is compatible with certain devices only. Try to use ETC texture compression and 16bit textures for Alpha. It will make your game bigger in size, but more universal when it comes to texture compatibility.

That, or release 3 versions of it, one for each texture format. DXT, ATC, PVR.