Build a 2D single-player arcade pinball game, portrait orientation. TABLE: Dark space background with glowing neon outlines. Vertical playfield with walls on both sides and the top, a plunger lane on the right for launching, and a drain at the bottom center between two flippers. CONTROLS: Hold SPACE to charge the plunger, release to launch the ball. LEFT arrow (or Z) for the left flipper, RIGHT arrow (or /) for the right. PHYSICS: Ball falls with gravity, bounces off walls, bumpers, and flippers. Flippers must hit the ball hard and feel responsive. The ball should never get stuck anywhere. FEATURES: - 3 pop bumpers near the top: 100 points each, flash + tiny screen shake on hit - 2 slingshots above the flippers: 50 points each - 3 rollover lanes at the top that light up as the ball passes; light all 3 for a 1000 point bonus and to launch multiball (second ball) - A spinner in the middle: spins when the ball passes, 10 points per spin - Score display and BALL 1/2/3 counter at the top RULES: 3 balls per game. Draining loses a ball. Game over screen shows final score with a restart button. FEEL: Particle bursts on bumper hits, glow effects, smooth motion. Simple physics is fine, but the flippers are the priority, they have to feel great.