Hi,
no no, I mean simply using an image as the board to check cycles. The game can be all in 3d with angled view, trails as real mesh, etc etc only they will "sit" on top of the game engine that itself only relies on setting and getting pixels.
Otherwise you will have to create some more complex framework to create colliders as the cycle moves and turns, which is totally feasible but not sure how it's going to behave when you have 4 or more players running on a big board with hundreds of colliders, would need some stress tests to make sure it will perform ok, with my solution, it will work just fine. It depends of course what you are after. If you want a tron game like the last one ( a normal bike game around a track), then will be better, if you want the original worm like tron in a confined space, pixel base management will be easier.
bye,
Jean