Every bike rides out only the way it faces. Bikes block bikes. Work out the order and empty the lot.
Try this one. Tap a bike to drive it.
Levels are built by the game, never by hand, so they never run out. Level 2 has 4 bikes. Level 45 has 50.
The lot follows your phone's clock: sunny paving by day, lamplight at night. This page does too.