I found 3 buttons in as many attempts before I gave up, I really like the atmosphere in this but the map is very large and easy to get lost in, so I feel like finding the remaining buttons would take me way longer than I have patience for.
The atmosphere was great, especially the red light that the robots give off (really cool way to have diagetic vision cones) and the huge robots that you can already see looming in the distance from the start. An issue I had was that I misunderstood the motion tracker, I thought it was supposed to guide you toward the codes so I tried walking towards the faster beeps which uh. didn't end well. An explanation for that would have been nice.
Another small note I have is that it says Controlls instead of Controls everywhere? And the E from the interact prompt with the buttons sometimes didn't vanish from my screen.