The kingdom's ruler is mortally ill. In order to save him, and the kingdom from the Evil Jester's clutches, you must find 26 items. Hand these to the Alchemist, and he will cook up a magical potion that will save the king.
Notes
According to the author, this ran on top of a custom OS that he wrote for the game. It relied upon CPU clock timings in the chips to work and it runs flawlessly on the emulators for the TRS-80 model I and III that he's tried.