It's fine... but I have to ask: is it really good to have another game in which you can't win?
You can complete a level -- but then a new, faster one starts. Change the semantics to "You won Level N!" and add an optional cookie to remember your high-scores, and this becomes a much more positive game.
You can complete a level -- but then a new, faster one starts. Change the semantics to "You won Level N!" and add an optional cookie to remember your high-scores, and this becomes a much more positive game.