It's a really pretty game, great job with the graphics - though I'd mimic the others in saying some sort of transparency would be nice.
On my phone (Pixel 5), I could yeet myself 20 feet into the air by tapping the jump section, I don't know if that's intentional since I don't get any stars for doing that lol, and it makes the game very easy.
I would appreciate being able to restart with the space key when not on mobile, but the jumping works just fine here.
Otherwise though, I think you nailed all of your goals for the game. It's a nice, relaxing little skateboarding game, and the graphics really are lovely.