Soul Crystal (DOS/C64, Avantgardistic Arts, 1992)
Gorgeous German graphic/text adventure hybrid. You can play it here.
Translation info for the determined: Google Translate is your friend. For the former, instead of typing everything by hand, you can paste screenshots into Google Lens and select the Translate option. It works better with screenshots taken in fullscreen mode (click the button above the speaker icon; go back with Esc) and seems to have trouble with the C64 version's intro.
C64 info: Use numpad 84620 for joystick - use it to select joystick controls when it lets you use the fake Amiga (open the 'drawer'; don't pick Install). Ignore the title; all disks are included. Disk-swapping instructions are in the description. When it wants a disk, select the second (Disk 1 Side B). The disk list is scrollable, which threw me off at first.