Can't use 'High Quality' graphics on iPhone 6 Plus? – Atom Run Review

I've been hooked on this game for weeks, even though I'm pretty terrible at all types of video games. But I also wonder why it crashes when attempting to play in 'High Quality.' On my 128GB iPhone 6 Plus. With all other apps closed. Hopefully there's a fix on the way!
Review by MikeInLasVegas on Atom Run.