Not too bad... needs some work
Some advice. The holes on the top view of hte board are see through, so when you slide the wheels over, it looks like you can attack them on either board. The problem being of course that this is impossible. You should really make them not see through.
The stickers imho should be possible to put on the top or bottom (if the top doesn't have grip tape of course, which shouldn't be hard to do (make hte grip tape a seperate element from the board). Different board styles would be cool. Perhaps way in the future, a way to see the board "in use" would be neat. The tagging needs some work. Right now it looks like just text written on the board. Lastly, I would work on the look of the wheels, and try to figure out a way to decide which side the stickers are on, so you can put them on in any order. Other than that, it's getting better.