Great game. It controls well, it looks great, doing tricks is fun. I like that the cop makes snarky and sarcastic comments on your skateboarding, it's a charming addition.
I like the idea that you can trade off luckiness for better combos, and having the cop car get closer with worse luck is a clever way to create more difficulty there, since it forces you to stay closer to the right. It does seem that the powerups tend to be a little inconsistent even at high luck levels. I had a good luck run where I didn't see a single one. I think there's potential in designing something where you intentionally alternate between good and bad luck to balance healing and points.
It seems the shuv-it may be the best trick choice, since every trick gives the same amount of points as the other tricks and can be done twice in a single jump. But you can chain it into a flip and still land, so it'd be cool if combining them got you extra points. If the two flip tricks gave more points, you'd have 1 shruv-it as the least points, followed by a single flip, followed by the double shruv-it, and then the shruv-it into a flip being the best points/hardest trick. Anything along the lines of using the different tricks to get extra points would be super cool for this.
I think it'd be fun to have faster scrolling options, for some high-octane skateboarding action. Like a difficulty setting, or a survival mode where the screen gets faster every minute or so.
Overall, this was fun. There's some good depth beneath the surface, and I think there's potential for it to be an outright excellent arcade-style game.