Arkatetris

This is my second pygame project, I used some game concepts like regulation of FPS and frame independent movement. I also check for app active events, thus app really stays idle while inactive (i.e. minimize and loss of keybord and mouse focus). In-game instructions: <- and -> arrows to move pieces; Up arrow for piece rotation; Down arrow to increase speed; Space for instant drop. Suggestions and comments are welcome. Hope you like it. =]