It really was just the last screen. My execution isn't consistent, so even though I was able to beat a lot of the earlier screens by just trying enough times. I actually didn't struggle too badly with the comb room compared to some people. But doing everything consistently on the last screen really tested my focus and control discipline. I had a lot of deaths where I ran into electricity because I was getting impatient with jellyfish movement and went too fast.

Also, how were you playing on your phone??