Hey Summit, first of all thanks for the positive comment :) I haven't used ArrowChat for a few years now and this is why no updates have been made to the theme.
I don't know how well you may know CSS but I assume AC has added more classes to the default themes CSS, if this is true then it would be a good idea to copy the new classes to the css of GameOn theme and customize them to be consistent with the rest of the theme.
You can contact me on my email address
admin@thebham.com if you would like any assistance or advice :)
P.S. I did request AC to make all my plugins and themes free for everyone but it doesn't look like they have done this :/ I will re-request this and if you have made the purchase in the past 15 days you should be able to request a refund.
Best regards,
Ben Hamlett