IPhone 5s sometimes gets stuck on games?

It's a brand new 2 week old iPhone 5s, this problem has happens to me 3 times now with different games, well the game still runs but the home/sleep button don't have any effect, and can't leave the game in any way until it restarts itself after 4 minutes or so, what's wrong?

Issue with the game

Whenever this happens, I immediately delete the game, it's always a different game.