1Since version 0.13: 2- Improved game control settings 3- Added key repetition 4- Made the "main puyo" more visible by blinking 5- Added score board and hall of fame 6- Added a new music and game theme 7- Added some sound effects 8- Added OpenGL support 9- Added a useless effect (corona) in the about menu 10- Improved in-game animations 11- Improved menu appearance 12- Added a useless effect (corona) in the about menu 13- Fixed eye blinking problem on rotating puyo 14- Fixed a bug when rotating left in a single column 15- Fixed Windows sound and fullscreen mode 16- Improved the end of game detection 17- Inverted the puyo orientation when they fall 18- Version in about 19- Improved the Makefile 20- Added a changelog 21