Joker Jailbreak: a single player card game

Welcome to Joker Jailbreak! This is a single-player, physical card game you can play with a standard 52 card deck.
Created by Ramon Huiskamp (roofkat).

Setup:

1. Remove jokers from your set.
2. Place a joker on the table.
3. Shuffle the remaining cards.
4. Place stacks of six cards top-down on each of the four sides of the joker, forming the jail walls.
5. Place two cards top-down on each of the joker's four diagonals, forming the corners.
6. Place an open card on each wall and corner stack (you should end up with 8 open cards surrounding the joker).
7. The remaining cards are called the "Remainder".

Goal:

Clear out one of the four walls around the joker, so they can be free! Hurray!
(Clearing out a corner does not let the joker escape, they can't squeeze through the walls like that.)

How to play:

• Play black cards against red cards of the exact same score to get rid of them
  • E.g.: a black 6 can be played against a red 6, or a red 4 and a red 2.
• Turn around the cards that were underneath the cards you played against each other.
• Repeat!

Rules:

• The Ace counts as 1, the Jack as 11, Queen as 12 and the King as 13.
• You can play cards from the Remainder on top of the joker, with a limit of three cards in a stack.
  • These cards can be useful if you're stuck, and can be played anytime.
  • However, they have to be cleared out in order to win, the joker can't escape with any card on top of him.

Fail state: 

• You lose when you are no longer able to play any cards against each other.

Strategy:

• Try to play away the walls as much as possible, try to avoid clearing out corners as it will limit your options, which i turn lowers your chances of clearing out a wall.

Alterations:

• To change the difficulty, add or remove cards from the corners. More cards in the corners makes it easier, less cards in corners make it harder.

Finishing notes:

• This was made over a weekend at my parents' place, inspired by Tom Francis's Gridcannon. I liked the constraints of making a single-player game with a standard 52 card deck, and it was quite fun to create!
• Thanks to my sister for the name :) I was going to call it Jailed Joker, but that's a bit of a tongue twister. 
• Please tweet me @roofkatgames to let me know what you think!
• I'm working on a videogame by myself called WarpThrough, would be great if you could check that out! https://store.steampowered.com/app/957770/WarpThrough/