2023-03-30

Sokoban: Winning the game

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Previously we made the cat move.

Mostly the code from last time.

Very playable.

Win condition

You’ve won the game if every goal has a box on it. So if there are no goal squares left with either nothing on them or player on them:

We’ll test it with a won level:

Seems fine. Let’s fix the commands so they take winning into account, and switch to very winnable level for testing:

Seems fine.

Undo

Also let’s implement undo. Undoing a move is kind of like moving in the opposite direction:

We undo by:

Removing the last character from moveList.
Moving the player in the opposite direction of the move we removed from moveList.
If the move we removed was in uppercase, “dragging” a box along after the player.

We can restart a level by undoing a lot:

Okay okay. It’s probably a game now...