Many thanks for all the feedback since the launch of Tetris Forever. We're investigating bugs and evaluating suggestions, but the improvements based on your input start right now.
And input is the right word! Today's update allows custom control configurations for all games in Tetris Forever, including the MS-DOS, Apple II, and Electronika 60 versions. To reassign the controls for each game, open the Pause menu during gameplay and select Controls.
We'll continue to monitor the forums for feedback -- thanks for taking the time and effort to reach out. Look for more updates soon!