Duckslayer Adventures v0.4.0 (Master System Game)

They just keep coming:

Duckslayer Adventures is a fresh Sega Master System homebrew game by haroldoop. Find a discussion here.
It’s a tribute to an Atari 2600 game named ‘Adventure’. Control the intrepid Knight of the Square Table, Sir Jelly, the gelatinous cube. His mission is to retrieve the Holy Chalice of Yendor that’s stored inside the black castle, guarded by two fearsome Duck Dragons.

via https://pdroms.de/mastersystem/ducks...er-system-game