Mystical is a vertical shooter from Infogrames.
Probably a Direct Disk to Cartridge Port.
Cover
Covers from CPCmania
Back Cover
Front Cover
Cartridge
Back Cartridge
Front Cartridge
Manual
You can download in PDF from CPCmania (see the links).
Game
You can download in CPR for use in emulators and BIN from CPCmania (see the links).
External Links
http://www.cpcmania.com/ (on the games section: GX4000/CPC+ GAMES)