In the home of the underdogs there's the full version of it...
I've finished Zanac cheating.. that boss before the last level is hard EVEN with cheat.. you have like 12 seconds to beat it... it's damn hard.
Zanac EX is rather easy... even more, if you compare it to the original Zanac.
Although, to be honest, I haven't played Zanac seriously for ages.. maybe today I would find it more easy, as my gaming skills are much better nowadays
(DAMN, I finished ARMED POLICE BATRIDER without CONTINUING! Am I good or what?