How do I add touch controls without jerky playback?

I have added 4 sprites to my game and added an anchor on each to act as buttons for my ipad game. When I preview the game, the playback is jerky.

Is this the best setup for touch controls and how do I avoid the jerkiness?

Thanks

Glenn

After a lot of digging I found that it was because my gui layers were set to parralax At 100. Setting them to zero fixed the jitter.