## Levels:

- use first line as background image name
- ignore comments in lvl files
- check  when sphere bounces from  one end to the  other endlessly w/o
  any solids in between. this is a game lock and equals game over
- Start the game  end timer and add a score FIXME:  put the actual max
  reachable score  into the  level definition  along with  the minimum
  steps required to reach it, also add a step counter

- Grid Observer:
  https://github.com/mlange-42/arche/issues/374


Screenshot:

Yes, since *ebiten.Image implements the standard image.Image interface
I just made a screenshot example (in Draw() function):
if inpututil.IsKeyJustPressed(ebiten.KeyS) {
    f, err := os.Create("screenshot.png")
    if err != nil {
        log.Fatal("can't create file: ", err)
    }
    png.Encode(f, screen)
}