Unused resources

The game includes graphics and animations that its level designs and play logic leave unused.

The game carries a whole UFO: two sprite frames, an animation and a behavior handler. Nothing spawns it, so it never appears in play.

Its design and colors are defined, but the level layouts never place it.

The gleam sequence is present in the break-animation table, but no brick selects it. The durability classes assign no tiles to it.