Further tweaking to Level Scaling. Fixed a few animation issues.

Level Scaling has been reworked again. The level threshold now scales
against the pervious the level threshold, making the distances much
larger as you gain levels.

Introduced an animation lock to prevent redraw of Fruits before they
are done animating.

Fixed animation pathing for rotating fruits.

Added current level indicator to play screen.

Signed-off-by: Alex Colson <guythundar@gmail.com>