The Sega Master System game jam is (obviously) a jam dedicated to the Sega Master System.

Limitations of the SMS:

64 color palette

32 colors on screen at once

display resolution 256W x 192H

more info at https://en.wikipedia.org/wiki/Master_System

Make sure you (if possible) upload HTML game file when submitting your game or just have a downloadable file.

Do the game submissions have to run on the Master System ?

No, the games do not need to run on the Master System they just need to look like a Master System game.

Do the game submissions have to be made in a certain game engine ?

No, the games can be made in any game engine as long as you can use the SMS palette and resolution is 256W x 192H.