Does not work with iPhone 4 – Little Ninja Fight Review

I used to play this game on my iPhone 4, not 4s but '4'. And it worked just fine and I had fun with it. But after an update I try to launch it and it just gives me a black screen and a tact that says I cannot play it on iPhone 4 and need a newer device. By the looks of it the update did not change much of the game so I don't understand why it can't run on iPhone anymore. If you can, please find a way to fix this.
Review by Bunband on Little Ninja Fight.