User blog comment:Shadowunleashed13/Sonic 1 iOS gets Elemental Shields/@comment-25329017-20140306233242/@comment-24286619-20140307184745

I went through marble zone act 1 today and found no area similar to the screenshot you made. Also, the entire act was linear, with only a few extra rooms. One was even thought to be scrapped by Sonic Retro!!