For this week's challenge, the theme is solving puzzles "one under par", meaning with one less move than the level number suggests.
The 3 codes of the puzzles are: 7754-08, 6924-09, and 4073-10.
To play these puzzles, you first have to unlock level 8 in the full game by solving puzzles on levels 1 to 7. Then you start a game with NEW GAME (in the main menu) and select CODE instead of a level to enter the first code. By solving that puzzle, you unlock level 9 and can enter the second code, and so on.
For everyone, who doesn't own the full game, here are some "one under par" puzzles that you can play in the demo version: 5238-05, 5268-06, and 5700-07.
As always, please let me know what you think of these challenges.
In other news, I'm currently working on displaying optional "UI hints", i.e. information about some of the keys and buttons that are supported by the user interface at each moment. The first version will probably come out this week, so stay tuned for that!