Display: Block.
Tetris, but every block is an HTML tag. Swap the cartridge in the homepage Game Boy to play it.
Ready to explore
Step into the game.
It plays right here, on this site.
The idea.
A falling-block game inspired by Tetris and by the HTML bricks that stack up when a gallery here is empty. The seven pieces are the seven one-letter HTML tags, and every block on the board is a real tag in the page. Clear a row and it’s clear: both; clear four and it’s !important.
How to play
On the home page, push the Display: Block cartridge into the Game Boy and press Start game. ← and → move, ↑ or X turns, ↓ drops faster, Space drops, C holds a piece for later in <template>, P or Esc pauses. On a phone, the D-pad moves (↑ drops), A turns and B holds.
The jokes
One row is clear: both; two are display: flex; three are display: grid; four at once are !important. Clearing on piece after piece is a cascade, a row holding all seven tags is W3C valid, and an empty board is <body></body>. Each level is an era of the web, from Web 1.0 and <table> layouts to Flexbox, Grid and vibe coding. Stack too high and it’s a stack overflow.
Inspect it
Open your browser’s developer tools on the board: the blocks really are <b>, <i>, <s> and friends.