See http://cosmiceffect.com.br/2011/01/20/um-encontro-inusitado/ for a review.
Here's the translation of the advertisement (by Slotman):
"Prepare your emotions! Just arrived: ZORAX - The first national action game for MSX"
"Finally an action game totally developed in Brazil! Programmed with the most modern techniques, including PARALLAX SCROLL, this game will be quickly incorporated into your favorite programs library. You're a fearless space warrior that should conquer Planet Zorax, freeing it from a terrible curse. See what expects you:
Five space stages and five planetary ones
Several different enemies
Involving level monsters
Detailed and colorful graphics
HI-Score saved on disk
Original music by Luiz F.Moraes
Get your copy right away. You won't regret it.
Authors: Leonardo Beltrão, Marcelo Nunes, Luiz F.Moraes, Alberto "Meyer" and Fernando "Scanner". 5 1/4 and 3 1/2. Price: Cr$ 2.640,00
100% NATIONAL PRODUCT
DON'T BE FOOLED BY PIRATES
ASK FOR YOURS SOON"