Would an iPod 4th generation and iPhone 4 be able to run game like Smashy Road: Wanted smoothly?

So recently I broke my phone s lcd screen, and I need to wait 7 months before getting a new phone(my contract). I currently am using a flip phone now but I do get a bit bored on the bus and in other situations so I have 50 bucks to spare and i've decided to buy a used iPod 4 or Iphone 4 for games etc. Now, what iim worried about is the ipod especially will be able to smoothly run some games. Smashy Road is a game I really enjoy playing and it says you need ios 5.1.1 to play so it would play of course but will it be lag free and smooth?

I would go for the iPhone 4 for sure considering it can run a lot of different apps a lot smother. Now smashy road, along with a lot of other games, doesn't take too much to be able to run. If you are any way possible to update your iPhone or iPod whatever you choose to at least v6.1, this should run perfectly!