This game really is garbage. The movement feels horrible.
And at the very beginning, you can go left and get the gun and prompt the text from standing near the computer terminal.. but that's it. The mario pipes in the center room show down arrows for the left two but no controls make you go down them. So that's it. An empty room to the right. A dead end with a computer terminal to the right and an overall movement design that feels HORRIBLE. The way you kill off horizontal velocity when dropping off ledges.. the way you shoot when you jump.. the way hitting down makes you jump. This and a million other things.
It's like the dev didn't even playtest his own game rofl.