I think the build is bugged on Linux?
I walked pretty far. I never had an option to shoot a gun or use the grappling hook, and none of the AI characters seemed to move or shoot at me. That said, I did enjoy running through the level. I got into the sneaky tunnel with the bed, climbed over a rail, and from there I think I was soft-locked without the grappling hook. Falling into the chasm caused a defeat screen. I thought the volcano effects / screenshake were well done, too.
I think what was here looked really cool! I might have to check it out when I boot into windows next.