hey, good to see someone else from Brazil!!! And it's even from Rio de Janeiro, like me! That's cool!
By the description you gave me, being an MSX 1 game, it looks like "Kaleidoscope Special" ... this game have another name in Japan, but I really don't remember now. Anyway, as you aren't japanese, you'll probably know the game as "Kaleidoscope Special"
there's a few screenshots of the game attached (including a shot of the title screen , and other shot of the screen where you choose what planet you want to go)
it's rather weird to speak with a brazilian fellow in english, but oh well !
Hope I helped yah find your fav game
thx for the comments mate, now give me your A600 and I give you my MSX 1