Swaps the unicode glyphs (◀ ▶ ⬆) for hand-drawn stroke/fill SVG icons
(chevrons, an eject-style plunger glyph, a coin glyph, a play triangle),
and positions the coin/start/plunger cluster with absolute + translate
so it sits on the bar's true center regardless of the flipper buttons.
The engine's default attachTouchControls() overlay was generic floating
circles; this swaps in an app-themed bottom bar (left/right flipper,
plunger, insert coin, start game) anchored to the screen edges instead.
valknar