Nova Update 1.6

Nova Space Knight is close to being complete. There are still many things to do, but the end is in sight.

Added a start menu - needs better text.

Added end screen - unfinished picture.

Cleaned up some of the player's code.

-------------------

Things to do:

Update Nova's sprite sheet.

Final boss needs its Y coordinates updated after it was moved.

Different sprites for the collectibles.

Music and sound effects.

End screen should be new layout.

Background elements for scenery.