wow I created a map back in 0.3 (? maybe) named claustrophobia. It was one of my first maps and was pretty bad. I have grown since then and I have created a couple good maps. There were no colours or block mixing or off grid or anything, so it was a pretty bad map. However, your map is quite good. The only recommendation is to try not to punish fast speeds. In a lot of your jumps, if you have too much speed, you hit the roof or don't land. This makes jumps a lot more difficult and a bit less fun. Also, try not to follow a high speed straight with a quick blind turn. A lot of your map would be better if you could see where to go. I know the map is all about close walls, so you don't need to make it open but instead use more signs and indicators. It's also really hard to see where 1 wall ends and another starts because of the shadows. Use diagonal blocks to smoothen out the walls. This makes the wall more defined and easier to push a faster and smoother line. Overall, this map is really nice, but a few improvements would make this map perfect :3