Zarx's tests (plural) only becomes true, if you refresh the page and inevitably die again in the same pit. The lack of an ability to jump and the fact that the game simply freezes as soon as one dies make this "game" relatively useless. If the joke is that every normal Earth Human is not able to survive this first test then you severely failed the punchline.
Reviews for "Facility X"
I died, and then the whole game just froze on me. No, it wasn't my computer, because everything else was working fine. If it's meant to do that, then I'm not sure this is my kind of game...
I don't know if you are trolling, or the game is simply broken, but no jumping ability, no goal...just walk into the hole and that's it. Waste of time.
What are you actually supposed to do in the game? Sure, you have an idea going there and a little story to go with it (even though it's only mentioned in the author comments, it's still a story, alright)
At first, I thought the only thing you could do was walking right and dying, but after restarting the page and testing buttons on the keyboard (You should add a retry button or make it respawn automatically, refreshing the page every time can be a little bit annoying) I found out that pressing Enter actually makes you fly a bit(- and if you're adding commands different than the usual WASD/arrows+space, you should also specify somewhere the controls, can be in the Author comments, just mention it), and managed to get past the pit. Cool, but the level didn't change, nor I saw anywhere to end it. Flying all the way up results in your character disappearing forever, just the same with the pit. There's no real gameplay to this game.
Graphics... Well, a game doesn't need to have complex graphics to be great, but try to tile the bricks a bit better, it looks patched up. :(
Sounds are usually appreciated too.
Wrapping up this review, as far as i've seen, no reason to submit this as "Mature". It doesn't have suggestive/explicit audio/text, intense violence, drug use, mild nudity, etc.
No controls info, no point at all, no stars