Thanks, I'm glad you like it.
For the generation of the tracks I used a very simple algorithm and from time to time the last segment runs out of room to continue growing and therefore the tracks vary in size.
As it is a jam I made the base of the game and then I keep improving it little by little. In the list of tasks to do I still have: make the tracks circular, improve the AI and make it multi-player. But time runs out fast in a jam :(