Added graphics to BOSS 1 and did some cosmetic work.
Made Boss 1 easier. Should be good now.
World 1 now playable as a set.
Small changes.

For example, can now push SPACEBAR to speed up transitions
Some score cutoff changes.
High scores from Main Mode now saved.

Locked based on seen in Main Mode
Reduced spawn rate and initial spawn for easy mode.
Adjusted score values
Easy Mode cutoff scores are now smaller.