Update the block styles to add a nicer border
Update some comments and the merged JS
Add primitive game over handling
Make new blocks start horizontally centered
Add the message overlay to the HTML and style it
Add game message handling

Triggering the overlay, as well as displaying the "PAUSED" and "GAME
OVER"
messages when needed.
Add the "drop block" functionality
Add basic sidebar for displaying score

Move default font-family to the body (sans-serif)
The sidebar will later be also used to display the next block
Add score counting and handling
Add next block prediction functionality