It's really nice idea, I like that it's generated. It also fits many different themes so you can go anywhere with that idea, I would probably suggest to go wild on that if you plan to finish it. It has potential to build an interesting gameplay around it especially with some polishing around the driving to add more fun to it.
Few tips:
- Starting levels could be on the player's click (so I don't have to wait so long)
- It's quite hard on 10lvl+
- Generation needs some fixes about have it spawns stuff.
Were there any sounds in the game?
No bugs.
Good job!