Am I the only one that's really confused by the beginning, where it's just an exclamation point in a triangle, and some dimly-lit wires/pipes? Previously, I got

Am I the only one that's really confused by the beginning, where it's just an exclamation point in a triangle, and some dimly-lit wires/pipes? Previously, I got to where the triangle was replaced by a few numbers, but got stuck there. I refreshed, and am still not sure what's going on.