Notice: This runs best in Google Chrome. The emulator runs pathetically slow in Firefox or in Edge.

A much better Windows 10 version is available here.

Instructions for use:

• Enter - Insert Credit
• Key 1 - Start a 1 player game (1 credit required)
• Key 2 - Start a 2 player game (2 credits required)
• Left Arrow - Move ship left (P1)
• Right Arrow - Move ship right (P1)
• Space - Fire (P1)
• Key A - Move ship left (P2)
• Key D - Move ship right (P2)
• Key W - Fire (P2)
• Key T - Tilt
• Key 3 - Toggle DIP Switch 3 (set number of lives; 00=3, 10 = 5)
• Key 4 - Toggle DIP Switch 4 (some sort of power on self test)
• Key 5 - Toggle DIP Switch 5 (set number of lives; 01 = 4, 11 = 6)
• Key 6 - Toggle DIP Switch 6 (0 = extra ship at 1500, 1 = extra ship at 1000)
• Key 7 - Toggle DIP Switch 7 (0 = display coin info on demo screen, 1=don't?)