6 ** do intro video with moviepy
8 ** intro animation (from target item to start position)
9 ** buttons of the scenes enabled sequentially
10 *** each scene has a version
11 *** when you win save the id + version
12 *** put an "update" if id is saved and versions are different
13 ** teeter-tooter with constraints (real teeter tooter), magnet, road cone, bucket
15 ** itch.io's client works with wine: functional tests for windows-itch.io