iOS player here, have installed the game, but not entered any referral code "yet".
Heck, I could probably uninstall and reinstall it a few times to enter multiple referral codes.
However, I'm looking for something in exchange
(nothing in life is completely free right?)
It's simple though, I need a few referrals in a different game.
"Motor World - Car Factory" - https://itunes.apple.com/us/app/motor-world-car-factory/id580666714?mt=8
Install that game, log in with mobage, complete the tutorial, and enter the code: HNGG410
Just drop me a PM with your in-game account name to verify the referral