The default controls are Z, X, ; and . for movement directions, but these can be remapped in the game options.
Puzzle, 1986Freeware
Also known as Chain Reaction
Puzzle, 1995Shareware
Puzzle, 1992Shareware, Shareware
Puzzle, 1991Shareware
Puzzle, 1993Freeware
Puzzle, 1995Shareware (installed), Shareware
Puzzle, 1994Shareware (installed), Shareware
Puzzle, 1994Shareware
Puzzle, 1996Shareware (installed), Shareware
Puzzle, 1993Shareware (installed), Shareware