It has potential...
The game is good and it could be one of the best parking games I have seen or played. However it isn't. The game is too short and the gameplay not varied enough.
I suggest timing the levels just for the sake of leaderboards to intice people to keep playing and not only adding more levels but difficulty levels.
(Eg. Learner: A scooter or moped or bike or something easy to park.
Normal: A Car or Small van.
Pro: Big Van, Limo or Bus.)
And obviously make the levels harder withing the difficulties as the levels progress.
I'm looking forward to a sequel. Good Luck.