From the introduction:
quest 1 find a large mango tree, one of the twenty meter tall ones (~60 feet)
quest 2 stand below the mango tree and, without resorting to any tools or technologies, wait and catch a ripe mango as it falls from the tree. do not let it hit the ground.
The game is distributed as a ZIP archive containing three PNG image files, a text file (game), and some licensing materials.