Quite faithful remake. Apart from holes in the models (probably because of smoothing without welding the vertices first), it looked really good! I like how you even rebuilt all the buildings outside the terrain! However, I got stuck in the first level because I tried to jump between the boxes and the stairs near the prop guy and couldn't get out. I also answered all the questions of the prop guy right but he still said I got them wrong. I even tried each combination. I also felt like the camera/player was very hard to control because of the acceleration curve. It took a while before you could turn long distances and when you were able to, it was easy to overshoot. Finally I noticed that items weren't picked up automatically when you were near them, so getting the binoculars was a real chore for example. Maybe it could also be a good idea to have some kind of controls explanation overview because having the run key mapped to Z might not immediately make sense to the player.