This games is pehaps the only one on Amstrad GX4000/Plus range to enable the use of an [[Analog Joysticks| Analog Joystick]], for the 2nd player.
<nowiki>
25b2 010ef4 ld bc,0f40eh
25b5 ed49 out (c),c
2640 b1 or c
2641 328580 ld (8085h),a
</nowiki>
The keyboard is read to determine the state of the digital joysticks and the P button (pause button on gx4000 console).