Yep, I was too lazy to change the palette of the tileset yesterday. I have made a quick fix with Photoshop 
Today I examined the game disks looking for maps and graphics. I couldn't find any unknown thing. Probably there are not more secret maps 
Perhaps some unused texts, but that's all.
You probably need to examane some disks at konami to find more unused stuff
Buenas...
Primero agradecerte Manuel el poder disfrutar del Sd en ESPAÑOL nada menos!!! (just give thanks to Manuel becuse now i'm able to play this awesome game in my language SPANISH)
supongo que dbes estar muy ocupado... pero te ha rondado alguna vez hacer un remake de este juegazo para pc con algun programa del tipo RM2k3 o algo asi (enquaring about to port the game to RM2k3 or similar)
bueno gracias por todo y si.... ya sabes igual puedo dar una mano (aunque eso no sea mucho 
)
Thanks for your kind words
Right now I'm too busy making games at my work, so I really don't feel like continue doing it in my free time.
If my memory serves me well, there was a post in these forums some time ago about developing SD Snatcher 2 (like Space Manbow 2 proyect) but for MSX, not PC
This is the international forum, so it is better to write in English. You can write in Spanish here: http://es.msx.org/
I don't have that images anymore, but I made new ones:
