Played all 3 demo levels on "Wild Mode" (i.e. "Hard Mode") and got all the secrets.
Meh. It's OK, but I kinda expected better level design than this, and even on "Wild Mode" I was nowhere even approaching dying. It's also kind of odd how there were no sound effects whatsoever in the cutscenes, and for a game this simple...the Switch seems to be having trouble running it. Ran into some framerate issues a few times when the camera would pan around.