I tried your game, and I have to say, the presentation and the atmosphere are quite fantastic! Graphics, lighting and sound design are on point. I like that the hand of the main character shakes a bit in terror, making the player realize pretty immediately that they are not a badass space marine but a normal guy put in a situation bigger than them. 

Just a question: Is there a way to jump? Because when I was reaching the second big red arena I couldn't progress due to a misalignment on the floor.

By the way, knowing how to make a game in Unreal Engine is indeed remarkable.