I too have a not so bright screen, but man is this dark, I can barely see what I am doing. It's probably ok for people with great screens, but for me it is very very dark. Nice little idea though, some sounds, graphics do work, nice addition with the train (I think ? heard it but saw nothing)
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Or maybe some parts of the ground could be more enlightened, for me the problem for example was on level 2, I could not see the ground, I just saw black everywhere on the lower part of my screen and did not see gaps. Or maybe have some kind of "leds on the ground" a bit like in cinemas ? I don't mind the room being very dark, but I mind not understanding where the ground is ^^