Really liked the feel of the game. The serious music and claustrophobic viewpoint made the train collisions seem very real and imminent at all times. One UI feedback: If you're planning to continue with a web build, 'Esc' first exits the fullscreen and then pressing again will pause the game. So you can consider another key as well (P, SPACE, etc), or maybe have a gear icon on the top right or so to bring up the Pause menu. As it happens, I'm not into horror and enjoyed the game as it is now. But I can see how adding more challenge can make this game more interesting. Wishing you the best to take this forward!