Thanks! I always found it disappointing whenever a game would force-reset you if you drove too far off-road; it makes the whole thing feel like a constrained illusion. Some of my favourite gaming memories as a kid were figuring out how to glitch out of the world and explore the surroundings, so I was keen to leave it free-roam. It's not part of the game design, but ultimately it's harmless fun, and I'm always happy to hear other people appreciate that too.
And more locations are coming, for sure - I'm hoping to include a mountains location in the initial Steam release, but will keep building new locations and updating them over time. Switchbacks are tricky to do reliably, but they're something I really want to solve soon. Cheers!