I've tried speedhack in a game with Android 4.3 and it worked just twice of docens of tries.
If it worked at least once i think that problem may have a solution.
My problem when it dosn't CTD (Crash to desktop) is that game still running but touchscreen doesn't respond (only game guardian icon).
Of course i've tried minimizing and restoring, different GG versions and s***.
Nice app, i should support it ! Make it work, i'll donate !