Thanks a lot for respond! No, there are no story/mission yet. This level was build to test multiple stuff(shaders, performance, scripts, animations, physics, etc). It doesn't represent final product, may be show the vibe.
"There's also a purple triangle by the zombie guy."- can You record it, and show on YouTube? Also, what is Your specs?
And no, it's not suppose to be like that. On my PC it looks like that: