🎹 Neon Tiles — Old MacDonald

A neon-styled 4-lane rhythm game built around the barnyard classic "Old MacDonald Had a Farm" — the chart was transcribed directly from sheet music and runs through the whole verse-and-"E-I-E-I-O" loop twice for a complete singalong cycle. Cyberpunk visuals with a cyan→magenta gradient palette, ambient drifting tiles on the start and game-over screens, and the Orbitron typeface turn the farm classic into something Old MacDonald himself would have a hard time recognizing.

🎮 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 — Some tiles fire a quick two-note unison pulse from a single tap, capturing the song's repeated-note "E-I-E-I-O" chant.
• 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 twice (32 measures total per cycle), transcribed directly from sheet music — the full verse ("Old MacDonald had a farm…"), the "E-I-E-I-O" refrain, the "and on his farm he had a cow" middle, and a second pass through the chorus.
• Every note plays at its actual pitch in E major (B4 / C♯5 / E5 / F♯5 / G♯5 — the song's bright open-fifth feel).
• Tempo is ♩=75, with each game beat = one 8th note (400 ms) — the slowest base tempo in the series, leaving lots of breathing room around the song's natural sing-along pace.

🎶 Burst Tiles for the "E-I-E-I-O"

• The "E-I-E-I-O" refrain features rapid repeated-note 16ths that would be brutal to tap individually. The chart packs these into burst tiles (the unison E5+E5 / B4+B4 pulses) where one tap fires a two-note flourish, capturing the song's chant-like rhythm without demanding inhuman taps per second.
• Bursts cluster heavily in measures 8, 9, 11, and 12 — exactly where the "E-I-E-I-O" lands in the music.
• 2-beat held cadence notes at the end of each phrase give the verse its natural breath.

🚀 Progressive Difficulty + Cycle Flash

• BPM increases by +12.5% per cycle (75 → 84 → 94 → 103...). At a base tempo this gentle, you can stay several cycles deep before the song genuinely speeds up to "fast."
• Each cycle is also transposed up by a whole step (2 semitones), lifting Old MacDonald's farm into ever-higher keys.
• 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, 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.
• HTML5 Canvas for the 360×640 game board with ha