Ancient Odysseys: Treasure Awaits! is designed as an introductory game that lets you start playing in less than 10 minutes. Choose which areas to explore, choose which monsters to attack, and choose how to dole out the treasure. Then proceed with your own adventures into the dark and dangerous depths, exploring either random catacombs or those you design yourself. Playable either as a solitaire or multiplayer game, Treasure Awaits! requires only a single six-sided die for quick and easy resolution to conflicts. Experience perilous traps, vicious monsters, toxic poisons, powerful magics, mysterious potions, and valuable treasures. Even if you're a veteran gamer, this new take on an old style of gaming will relieve your retro-fantasy cravings.
As the rules don't quite spell out how to build a dungeon on the fly, here's my interpretation. Three handy tables on one page, giving the number of portals, with different distribution for traps/creatures/treasures per given chamber.