How to play Corrupted Crypts

About Corrupted Crypts, from BoardGameGeek:

Solo dungeon crawler board game where Elder Ones seized the dungeon and you need to get rid of them, gathering runes and Necronomicon to summon the Eldest One and fight him in the final encounter. The game takes place in a very classic dungeon full of goblins, orcs, and undead. Visuals are strongly inspired by good old PC dungeon crawlers and Fighting Fantasy aesthetics. Gameplay is simple, you just flip dungeon cards and resolve encounters, mostly with rolling dice. You have 10 characters to choose from and there is around 120 encounters and 90 items. -description from the designer