EVIL DUNGEON (C64) by Gregor Schillinger
https://retroarts.itch.io/evil-dungeon
In this C64 fantasy dungeon crawler you play as Alrik, a young adventurer who has to master his first quest. Fight against monsters, search for treasure and plan your next steps to escape the Evil Dungeon labyrinth.
I found the game via this library of C64 games you can play in your browser, thanks to that website you too can play Evil Dungeon online.
There is even a sequel: Evil Dungeon II.
I played this game for about 25 minutes before accidentally refreshing the browser and loosing my progress; I intend to play through to completion to review it fully in the coming days.