This is a lot of fun, but holy hell the randomized traffic can be absolutely cancerous in the race mode. I honestly think the race mode would be way more enjoyable if traffic was turned off entirely. The randomized traffic during the races adds too much BS to the equation which ends up making it kind of frustrating.
Also, just would like to confirm if you tested all of the "gold" times to make sure they were realistically possible? A few of them seem like they might be nearly impossible to get unless you get perfect traffic RNG and drive extremely well on top of it. For instance on the "Downtown" track I drove a lap that I thought was pretty dang great where almost no traffic showed up and I didn't make any obvious mistakes or crash into anything and still only got a 27:00 and I'm not sure what else I'd need to do to shave off another second to get below the 26:00 and I was only able to get that 27:00 after doing the track maybe 30 times and finally getting a good lap with almost no traffic.
Other than this uncertainty it is still a lot of fun and has a great feel to it, especially for a "3D" PICO racer. The only other issue I've noticed is that every once in a while for some reason the car will seem to turn way harder to one direction or another than it usually would, like normally if I tap left it will just adjust slightly to the left, but every once in a while I'll tap a direction and the game will read it as if I'm doing a long press and turn HARD in that direction. Doesn't happen often, but I've noticed it happen like once every ten races or so.