The World Ends With You will alway crash an iPod touch (3rd & 4th)

Even trying to eke out 150MB of free memory on the iPod touch using creative means (disabling launchdaemons), the game will quit on the most intensive scenes (i.e., too many onscreen objects). The last resort option for this device would be to enable the dynamic_pager daemon. I won't do that. It was just an interesting curiosity that it could even run on the old iPod touch in the first place. In the end 256MB iOS devices won't do at all. So to play The World Ends With You, just use a 5th generation iPod touch. Or an iPhone 4/4S/5. Or an iPad 2/3.

iOS 5.1 on a third generation iPod touch