Sky Blaster 1.0a

A bit bigger update to the game for the year 2023.

New stuff includes:

• demo of a story
• fmv (thx @TrekkiesUnite118 for help with cinepak)
• coop mode
• new enemy with homing projectile
• tweeked controls
• new music (by random stuff)
• Fixed some bugs and introduced new ones

28th anniversary competition post