This game scared every cell of my body, I'm very impressed since this is the first time I'm really scared playing a game.
Idk if it's intentional but
<SPOILER ALERT>
<SERIOUSLY, DON'T READ IF YOU HAVEN'T FINISHED THE GAME>
in level 3, after I got the gun (damn that sky thing... I loved that idea, it gave me chills all over my body) and looked at A C and D I was searching for B then I remembered that there was a wall in the first level that I didn't break, so, instead of doing all the way by foot I thought I could use the terminal as a "teleport/fast travel", but demOS rejected all my commands and I couldn't exit the terminal, so I had to restart the game and do all the third level again. It could have been intentional and it actually could have had a lot of sense if it was. I was just curious to know if it really was. :)
<END SPOILER>