The game can be played here: https://www.emkani.dk/hexawarrior_game/index.html
HexaWarrior is a very light dungeon crawl game. Each you progress further down a dungeon by choosing between doors until you find the stairs down.
The core gameplay feature is to translate between different number systems, namely hexadecimal, binary and normal decimal.
The purpose of the game is to teach or help memorize core number conversions. While this form of conversion is not normally done in the head “in the field”, it still helps provide a core understanding.