Alien planet underwater research 2 (vz200)

Port of second quest of zx spectrum game Alien planet underwater research on vz200 computers. Unlike first part the treasures is hidden behind walls and there are many hidden secrets in this game. Your goal in this game to find a staff, but there are also optional quests: to find a sword and diamond.Also link to walktrough of zx spectrum version (2nd quest) which is similar to vz200 version, but with more enemies which shows only main quest.