Tried it on my phone and I'd say it would be a perfect game for commuting with some minor improvements. I think you need to tap a little to fast to accelerate enough, couldn't tap fast enough the first couple of tries.
I'd also love to to have kind of an infinite mode where if you get rid of one police car you get a point and another one shows up. That's because I think this game gets more fun the longer you play, and getting rid of one enemy is quite easy.
Loved it nonetheless!