3 ** manage the physics of the to-be-instantiated with a ghost
6 ** implement the operations of the buttons
7 ** create one level per item, then levels with more items
8 *** e.g. item1, item2, item1+2, item3, item1+2+3, ...
11 ** do intro video with moviepy
14 ** itch.io's client works with wine: functional tests for windows-itch.io