If the game prompts you to press Z and nothing happens, press Y instead. This is a German game, and the German keyboard layout swaps Z and Y (Z being a way more frequently used letter in German words).
Puzzle, 1992Shareware, Shareware
Puzzle, 1995Shareware
Puzzle, 1994Shareware
Also known as BOB
Puzzle, 1995Full version
Puzzle, 1993Shareware (installed), Shareware
Also known as Crusher Castle 2
Puzzle, 1993Shareware
Puzzle, 1991Shareware
Puzzle, 1993Playable demo
Puzzle, 1991Playable demo (installed), Playable demo, Playable demo