If you want games on your iPod Touch your going to need to go to
http://www.apple.com/webapps I think.
Or Your going to have to downgrade to 1.1.1 and go to jailbreakme.com on your iPod Touch and "Hack" it to get 3rd Party apps.
Just go to youtube and search "ipodtouchmaster" he has tutorials.
But please dont jailbreak its not worth it,it just wares down your ipod and makes it more unstable.But the worst that can happen is that you have to restore. if you have anymore questions just message me for my AIM