Yea strongly agree about the terrain issue. Because of LOD clipping and the terrain being one-sided it was very possible to end up in a place where you can't exactly see where to go next and even lose the whole level especially with the fixed camera. The self-destruct button was a last minute patch for that but even then it's not great as it has it's own bugs and can be disorienting. Good point about the boost, original we used the particles turning blue that is too subtle. I think the trail swapping for a different color or a camera change would have made it much more clear when it stopped/ran out.
Thanks about the maps, we had a lot of fun with sky boxes road design.
This is great feedback. Thanks!