If there was one thing in the game I could change, it would be the sounds of the ATV. If you're going down a steep hill and feathering the brake (pressing the key rapidly because it only detects "pressed" or "not pressed"), it just loops the same sound in quick succession. That's just one example of what I'm talking about but I could go on. Otherwise fantastic game, I'm having a blast so far.

The ATV will get a rework at some point, new model and sounds.
Though, I'm not really sure what you meant by this. That is the sound of the ATV starting to move, but you are repeatedly stopping it so when it starts going again, the sound will obviously repeat. I haven't even found a use for feathering the brake in the first place.