Nice little game you have made. I like your use of the command window, I would really like to know how you implemented it, because I made a similar one in my game, "Digital Haunting" but it was getting very bloated and hard to maintain and I had far less commands.
Also, this is probably not too much of a bug and more of a conflict with WebGL and browser behaviour but I noticed that when playing on your web build, that when I went to crouch and move forward into the vent, the shortcut for closing tabs would activate (CRTL + W). The only quick fix I can think of is making the crouch button toggle-able. That way, player's aren't holding two buttons down at once.