first transfer purchases from the touch, then back up the touch, then plug in the iPhone, and when setting up, it'll ask you if you want to set up as new, or restore from backup. Choose restore from backup, choose the most recent backup of the touch, and hit ok. It'll restore from the backup of the touch
if everything is still the same as the last time I did it, THIS IS THE MOST IMPORTANT PART: as the phone is syncing for the first time after restoring (as in, right after, before it has done anything else), DON'T TOUCH IT. Don't let the sync get cancelled for any reason. If it is used before it can install the game you're hoping to have saves transferred from, it'll dump the saves, as it sees them as data for an app that isn't installed. Only if the app is installed right away will the saves transfer