Retimed to 17m 11s 910ms after timing the video.

Not a bad first attempt, with more practice and using a faster character like Granny this can easily come down by a lot

I didn’t include delivery as it’s not time based so wouldn’t really goes with the others or make sense on speedrun.com

I haven’t extensively tested it, but you can tell from the ghost if I try another character against my best Franny ghost

She's significantly faster than most of the others and has a great turning circle. Boss at least feels close to her, but she feels better to me. I set my old times with Bubba, because I thought his small hitbox would make up for the lack of speed, but that turned out not to be true.

Oh that respawn strategy is interesting

Plenty Flip Restart: There seems to be an invisible bump or something just behind the starting area in the track Plenty (see my PB), I have no idea if there could be a consistent way of doing it, but plenty of people on the iOS leaderboards seem to have found it as well, and I have gone over it without flipping once before, so maybe it's doable?

ZigZag glitch: I've only seen this work on the track 'ZigZag', but for some reason on this level if you reset while colliding with one of the barriers, instead of spawning parallel with the rail you spawn pointing diagonally left, allowing you to turn much quicker and gain 2-3 tenths. The best way of doing this is to reset normally, then drive straight into the grassy patch on the second barrier, although I've seen it trigger on most of the others. My guess is that the spawn point is too close to the yellow rails so the game gets confused and tries to move you away from the rail.

Tight-turning trick: It's possible to make a tighter turn than usual if you first tap in the opposite direction before quickly holding down the desired direction (i.e. for a tight right turn, you would briefly tap on the left side of the screen before immediately holding down on the right to turn right). This is usually faster as you spend less time in the turn and can start accelerating again sooner, as well as allowing you to beeline for the corner.