This is good for a first map. I like how it starts out easy and gradually gets harder, but I never felt stuck or frustrated.
The visuals are simple but effective, which is rare for a first map. Usually people (myself included) try to go all-out for detail and have lots of texture errors, but this map has a simple style which is good for racing. The fog is a bit too thick sometimes (especially on the bridge where you can't see the other side) but it gives a nice effect and I wouldn't remove it completely.
One suggestion I would make is: in the Egyptian room, put the spikes further away from the teleporter. I ran straight into them without having time to stop the first time, and something like that would make people feel cheated in multiplayer. Also, the "trippy" green room is cool but I would put some obstacles in there because it looks a bit empty.
Also, "became a free" reminds me of polandball. Not trying to make fun of you, just pointing it out. (The correct way is "became free")