*DMA sound channels : the sounds are minimalist... the game even do not features the Spectrum128/Atari ST chiptune (which is quite good) so it is most probable the DMA channel weren't used.
*Raster interrupts : one Bitmap ink on the Mode0 part of the screen is used to display some raster effetseffects, actually even betterly done as on the 16bit Atari ST/Amiga versions, and closer to the Arcade version. sadlySadly, as said before, this just displays even more the non-masked attributes from the sprites (with a lot of diagonal designs...). When not "Software attribute based sprites" are displayed, the games manages to look quite good. *Mode change : the texts during Menu page or cinematics, and the upper HUD (top of the screen) are in Mode2 (1bpp) while the rest is in mode0 (4bpp). Despite being Mode2, the letters (characters) used 16 pixels and could have been done in mode1. This part seem to slightly bug on emulator.
*Others :