The Royal Game of Ur is an ancient race game where the player must be the first to exit his tokens from the board.
This cartridge features:

6 different AIs which are unlocked as the player wins games
3 different rulesets and the ability to create your own custom ruleset

At the start of the cartridge, the main menu has 4 entries (left-right to cycle the entries):

new game: play a game by selecting a ruleset, an AI level and by defining who plays first
rules description: explain briefly each of the ruleset (top menu for the ruleset, bottom menu for each rule information)
edit custom rule: define your own ruleset
reset game: reset all game progressions and custom ruleset to factory settings. IMPORTANT WARNING: it doesn't request for confirmation once selected by X.

The rulesets are:

basic: simple race game which can be played against the first 2 AI levels
intermediate: simple race game with simple betting which can be played against the first 4 AI level. Winning against the AI player unlocks further AI players
advanced: complex race game with complex betting which can be played against the last 4 AI levels
custom: user defined ruleset with its own game progression. The player must win against the lower AI players to unlock the next ones.

Designer notes:
I have been inspired by the essay and videos of Mr Irving L. Finkel regarding the royal game of Ur. I wanted the player to play this ancient boardgame versus Assyrians and feel a distant connection to this long past era.
The game does not have any music since I did not have the time to compose one. However, if enough players request for it, i will try to add an assyrian one.
Enjoy. May Pazuzu be with you !
PS: the cartridge illustration is a bas-relief sculpture of the benevolent assyrian god Pazuzu. This bas-relief can be seen at the British Museum.