That description: "Absent! Will be added as needed ..." is truly intriguing ;-)
As for the game: simple, but brilliant and addicting.
This is what I can call an elemental Tetris.
For those for whom it is not obvious:
Air wipes out Dirt;
Dirt soaks up with Water;
Water takes out the Fire;
Fire sucks up all the air - ok, Oxygen to be precise.
Only one explanation would be needed: why sometimes the red line is dropping and some of my bricks get removed even when no brick even reached it yet? For example the game gave me a "game over" at the moment when my Water brick was extinguishing a stack of Fire blocks.