Title screen
Collect the diamonds and shoot the baddies.
Door appears
Level 2
Title screen (PCjr)
Level 1 (PCjr)
The exit door appears! (PCjr)
Level 2 (PCjr)
Level 3 (PCjr)
Level 4 adds a new enemy robot type (PCjr)
Level 5 and we meet the invulnerable skull robot (PCjr)
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