It appears that Touch input does not register in Fiz and other various games, due to a bug in these ROMs with this device. We're researching to see if we can figure out a workaround, but for now the issue seems to be with the ROMs themselves and not Fiz, so we may not be able to do much about it. Please see the links below for more details.
In the mean time, we've confirmed that flashing to a stock ROM on the G2 fixes the issue, and have not confirmed, but suspect, that downgrading to an earlier version of your custom ROM may avoid the problem as well. If that's not an option for you, please contact us using the New Ticket button above or by emailing email@example.com and we'd be happy to refund your purchase.
- AOSPA Paranoid Android ROM: http://forum.xda-developers.com/showthread.php?p=48492487#post48492487
- CM11: http://forum.xda-developers.com/showpost.php?p=48481952&postcount=950