Killer Cobra (Amstrad CPC)

Developer Message
Hidden within the tape is a message from Richard Aplin. It starts at offset and can be viewed with any hex editor.

If you want to start on any level, try holding down: CTRL+SHIFT+JOYSTICK UP+FIRE .. give me a credit if you send it off to a mag!! (if that's you, RpM, ta for the flyspy comments!)
 * Hi there hackers! Richard here (I wrote Fly Spy!!) **
 * This should be very simple to hack! Have fun...   **