Your are Playing Space Invaders 91 on Sega Genesis
Controls
Toggle Menu: F1
Save state: F2
Load state: F4
Fast forward: Spacebar (toggle)
Slow motion: E (hold)
D-pad:
Arrow Keys
A button (OK in menu):
X
B button (Back in menu):
Z
C button (Back in menu):
A
Select Button:
Shift
Start Button:
Enter