crystal-tetris port of Dashed/tetris-sdl-c to crystal-lang Prerequisites libsdl2 libsdl2-gfx libsdl2-ttf sudo apt-get install libsdl2-dev libsdl2-gfx-dev libsdl2-ttf-dev brew install sdl2 sdl2_gfx sdl2_ttf How to Build crystal deps crystal tetris.cr