This game is only for AGA. Originally graphics are for VGA in 256 colours. Reducing pqlette to 32 colours is very hard. Except that, blitter in AGA is fastest like ECS and A1200 have CPU 68020 and 2MB of Chip Ram. Stock A500 is too simple for this.
Well, you could require 2 MB ChipRAM and 68020 for an ECS version anyway. I would love to see more stuff released for Higher End ECS systems.