This review explains the gameplay pretty well. It's based on the MazinSaga manga by Go Nagai, not the Tranzor Z series (American dub of Mazinger Z) that some youtube users are saying.
sweetcandy37
Messages : 31 Country : FRANCE
Subject: Re: [GAME] MazinSaga [1993] 2/12/2013, 4:31 am
I realize that there are a lot of games about Mazinger ! Great !