I found the guy but couldn't reach him, and was bummed when I couldn't take the stairs :D I only see he's looking out of bounds. And I did jump around trying to see, but not sure what he's looking at.
We all need to learn a million things — and it's my first 3D as well! I found the performance in your submission to be much better than mine. But some of those hickups could be to the engine itself. Regardless, optimization is a beast in itself.