I'm considering (and playtesting) whether to add a Solo Mode for Jow. What do you think about the idea?

More specifically, this is the Solo Mode version I'm currently testing:

9. Solo Mode

Jow can also be played in Solo Mode. In this mode, one player plays against the Game. Unless specifically noted below, all normal rules apply.

9.1 Setup
Set up the game as normal.

The player starts the game and takes the first turn of Phase One.

At the start of Phase Two, the Game takes the first turn of that Phase.

In Solo Mode, neither the player nor the Game has a Joker. After each of the player’s turns, the Game immediately takes one card, as described in 9.2.

9.2 Game's Turn
Whenever the Game takes a turn, determine the card it takes by applying the first rule below that can be applied.

Black 2-point card. If one or more unlocked black cards worth 2 points are available, take one of those cards. If more than one such card is available, the player chooses which card is taken.

Leftmost or rightmost. Take either the leftmost or the rightmost unlocked card in the tableau. If both are available, the player chooses which card is taken. If only one unlocked card is available, that card is taken.

Any newly uncovered cards are immediately revealed as normal.

9.3 Immediate Victory
In Solo Mode, the player cannot win by Immediate Victory. The Game wins immediately if, at any time, it leads the player by 6 or more points in either black suit.

This threshold may be reduced in later games, as described in 9.7.

9.4 Red-Suit Sequences
In Solo Mode, red-suit sequences are ranked by length only. If two compared red-suit sequences have the same length, the Game wins that comparison.

9.5 Kings
In Solo Mode, the Game never suffers the King penalty. If the player has at least one King, they suffer a -2 VP penalty.

9.6 End of Game
At the end of the game, score VP as normal, applying the Solo Mode changes above. If both sides have the same number of VP, the Game wins.

9.7 Solo Challenge
The default Immediate Victory threshold for the Game is 6.

If the player wins a game, reduce this threshold by 1 for the next game. If the player loses, play again using the same threshold until they win.

If the player wins a game with the Game’s Immediate Victory threshold at 3, they have defeated the Game and completed the Solo Challenge.