Full version released as freeware on Aminet. Includes level editor and bonus levels.
http://aminet.net/package/game/2play/R3Requirements:
"Works on any Amiga with 1MB or more RAM, Screen must support NTSC"
However, there is a low-chip option, using degraded sound samples, for Amigas that "have Kickstart 1.3 AND only half a meg of chip memory"