INVENTORY:

land
air
a signed copy of "the problem with jetpacks"
fun
mud

SCORE: 1

ACTIONS:

> Please combine LIFE and FUN.
You made LAUGHTER!
New day, new card! You receive A BULLET (Monday)
> Please combine LAUGHTER and BULLET
You made PEN FROM PARADISE HUNTING LODGE 
HAPPY TUESDAY! You get a card that says MAGIC WAND
It's Wednesday, and you've just received AIR
You made A SIGNED COPY OF "THE PROBLEM WITH JETPACKS"
** You unlocked a story!
Thursday brings WATER
Friday was LAND, Saturday is FUN
> Please combine LAND and WATER
You made MUD
** Try other commands in addition to combine