reorder methods
add getRowState()
just formatting
remove debug line
draw squares during initialization
took out the run() method (<this> bug)
draw last shape, even if invalid
disable board after game is over
add 'Play again' action
refactor methods, add tetrisGame.js
remove dummy file
play button style
display 'next tetromino'
don't increase the score with the last tetromino, when the game is over
fixed spawn/initial Tetromino coordinates
add favicon