🎹 Neon Tiles — Yankee Doodle

A neon-styled 4-lane rhythm game built around the colonial fife-and-drum classic "Yankee Doodle" — the chart was transcribed directly from sheet music and runs through the full 16-bar march top to bottom. Cyberpunk visuals with a cyan→magenta gradient palette, ambient drifting tiles on the start and game-over screens, and the Orbitron typeface march the revolutionary anthem straight into the synthwave parade.

🎮 How to Play

• Tap / Click — Tap tiles on mobile, or click them with the mouse on desktop.
• Keyboard — Use A S D F for the four lanes (left → right).
• Hold notes — For taller tiles, keep the key/finger pressed until the tile clears.
• Burst tiles — A few tiles fire a quick two-note flourish from a single tap, capturing the song's neighbor-tone passing 8ths.
• Pause — Space or P
• Mute / Unmute — M
• Quick start / restart — Press D while any overlay is showing.

✨ Features

🎵 Real Score, Real Pitch

• 16 measures played straight through — both halves of the march (the verse "Yankee Doodle went to town..." and the chorus "Yankee Doodle keep it up, Yankee Doodle dandy...").
• Every note plays at its actual pitch in G major across a comfortable melodic ninth (B3 → C5), making it the widest melodic range in the batch.
• Tempo is ♩=180 in 4/4 time, with each game beat = one 4분음표 (333 ms) — the fastest tempo in the batch, giving the chart proper marching-band snap.

🎶 Quarter-Note March + Cadential Snap

• The chart uses 4분음표 슬롯 mode — 1 tile = 1 quarter beat — so the visual rhythm reads exactly like a fife-and-drum tap pattern.
• The song's iconic 2분 + 4분 + 4분쉼표 cadence ("Doodle dan-dy ___" / "girls be han-dy ___") lands at m8 and m16 — a long held G4, a short G4 tap, then a quarter rest. Two clean march-style endings.
• 3 sub-slot bursts at m9, m11, m13 capture the neighbor-tone 8th-note passing figures ("Father and I went..." / "There we saw..." style ornaments) without breaking the quarter-note grid.
• The score's whole notes have been split into 2분 + 2분쉼표 so even long sustained moments keep the march bouncing rather than stopping dead.

🚀 Progressive Difficulty + Cycle Flash

• BPM increases by +12.5% per cycle (180 → 203 → 228 → 256...). At a base of ♩=180, cycle 2 already crosses ♩=200 — full-on marching-band pace.
• Each cycle is also transposed up by a whole step (2 semitones), sending the brass-band tune into ever-higher fife range.
• Cycle transition flash: every new cycle pops up a centered banner — CYCLE 2 / ♪ +2 · ⚡ +12% — with a scale-and-glow animation, so the moment you survive into harder territory feels earned.

💢 Visible Miss Feedback

• Tap on empty space, hit the wrong tile, release a hold too early, or let any tile fall off-screen — all trigger a red flash at the relevant tile (and a circle pulse at the tap point), held for 450 ms.
• Plays a dissonant low buzz with downward portamento so misses are clearly audible.
• The game ends after the miss display, giving you a clear "what just happened" beat.

🎨 Polished Neon Visuals

• Hand-tuned per-lane colors along a cyan → blue → purple → magenta gradient that matches the logo.
• Glowing tube borders, soft outer halos, and scanline textures only inside the active press zone so the tappable area is instantly readable on hold tiles.
• Ambient floating tiles drift continuously down behind both the start screen and the game-over screen.
• Animated "neon tile" START button that physically slides down the board into the game on press — no jarring screen transitions. Same treatment on the PLAY AGAIN button.
• Score-burst flash animation on every successful hit.

🧠 Smart Lane Distribution

• Lanes are picked dynamically rather than randomly: the algorithm avoids consecutive same-lane spawns and balances left vs. right side usage.

🎯 Forgiving Hold Timing

• Hold tiles only require 75% of the full duration — releasing slightly early still counts.
• The hold-progress fill uses a soft gradient fade at its top edge instead of a hard line, so there's no visible pass/fail boundary to fixate on.

🎼 Scoring

• 10 points per beat cleared (so a 2-beat hold = 20), with bursts counted as a single tile.
• High score saved locally and shown on the start and game-over screens.

📱 Mobile-First Input

• Multi-touch support — different fingers on different lanes are tracked independently.
• Coordinate-based hit testing rather than lane-only, so taps register exactly where your finger lands.
• touch-action: none and user-scalable=no to prevent scrolling/zooming during play.
• Viewport sized in vw units (9:16 portrait) so it scales perfectly across phone screens.
• Mouse-up listener attached to window so releases register even if the cursor leaves the canvas.

🛠️ Tech Stack

• Pure HTML / CSS / JavaScript — zero dependencies, zero build step.
• **H