Mighty Magus can be best described as an arcade D&D game set in the 30 levels of the Rising Sun Temple. The temple is the haunt of warlocks, wizards and fierce dragons. There is an element of Jet Set Wily in as much as the various platform levels are connected by stairways up or down which you can walk, or jump through to ignore them. The overall object is to descend to the depths to confront your arch enemy, the dragon Fraugy The Fierce, and then escape by returning to the spot at which you commenced the game. There is no fixed exit, and each game resets the entire layout of the temple.
The screens scroll along with the movement of your hero, the Mighty Magus, a graphical cousin to The Alchemist from Imagine's game. On his travels he will encounter many hazards, some less obvious than others. The large nasties can be taken care of either by running away, fighting them or casting spells - you can jump on top of them too. Fighting and spell casting will rely on your strength versus that of the meanie. The floors are dotted with magic squares which may teleport you somewhere you didn't want to go, or knock you backwards. Other squares kill the unwary and some spring lethal traps. Chests and rubbish heaps will yield up various useful and not so useful goodies when they are searched. To the right of the playing area is a status panel with score, lives, power, magic levels and items collected.