This is a liberated game: originally it was sold as shareware, but in 2005 author Mike Voss released the full version as a free download.
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