Small question after 8 hours of doing one Level

[Jaaneek]

Hello Guys.
I just beated the summits gate ^^ it took me 8hours but i did without any help or using flags so im happy about that.
After all that time and almost throwing my computer out of window i have only one question.

Is that concave or convex?

[Hellenar]

If you’re talking about whether those are walls or pits, they’re walls.

And when you mentioned the question now they won’t stop switching back and forth…