Ive played it and it still needs a bit of work.
You did patch up the problem with certain carts not being able to hop the ledges and keep momentum without bouncing, but I still feel the inside of the volcano still needs scrubbing. Speedcarts and their collision physics dont work well on tracks with a lot of debris which the volcano has in bulk. They continuously bounce, get stuck and is extremely hard to have a non one sided race on. There isn't enough space in the volcano for carts to really pass each other without having a physics attack.
The volcano inside needs to be smoother and perhaps a tad larger. Right now you have to be extremely careful NOT to die. Most rounds ends with the last man standing, not a winner.
Also, shouldn't this be in the gallery?