You can now play this game with a mouse on THEC64/THEC64 Mini and THEVIC20. Firmware v1.6.1 reads most or all USB mouses and trackballs as a 1351. The following CJM file should work:
T:Advanced Space Battle
A:More.Gore
X:64,pal,driveicon,fullheight
J:1M:
J:2*:JU,JD,JL,JR,JF,JF,,,,,,,,,