Shifter

A two-player duel on a square board scattered with mirrors. A ball starts in the middle each round and runs one cell at a time, bouncing off the mirrors: straight ones turn it back, slanted ones turn it a quarter. ROWS, in yellow, slides whole rows left or right, and COLUMNS, in red, slides whole columns up or down. Both wrap around, and neither may slide the line the ball is in. Shift the mirrors so the ball escapes your way. A ball leaving by a side scores for ROWS, and one leaving by the top or bottom scores for COLUMNS. A ball still on the board after 200 cells is a draw. The board stays between rounds, and first to 5 points wins. Three speeds, and one player can face a computer COLUMNS.

Controls: Controller 1 is ROWS: up and down move the row cursor and left and right slide the row. Controller 2 is COLUMNS: left and right move the column cursor and up and down slide the column. On the title, up and down choose a line, left and right change it, and a button picks.

ColecoVision version credited in the source to Claude (an AI made by Anthropic) for Amy Studio, in Amy, the language by Amy Bienvenu, 2026: a reimagined adaptation of the published rules. From COMPUTE!'s Gazette, March 1986, page 40: original Commodore 64 program by Kevin Mykytyn and Mark Tuttle. The listing ran on the Commodore 64 and Plus/4. This is a modern homebrew adaptation, not a commercial Coleco release.