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Cool Puzzle is a fully offline, single-player jigsaw puzzle game built as a desktop app. Players assemble scattered pieces into a complete image on a free-form board. It features a polished AAA-style UI with animated menus, particle effects, procedural audio, and multiple game modes.
Classic Mode — Relaxed, self-paced puzzling with an optional timer. No pressure, just enjoyment.
Speed Mode — Race against the clock. Placing pieces quickly builds combo multipliers that boost your score.
Daily Challenge — A fresh puzzle is generated every day. Complete it for leaderboard glory.
36 built-in puzzle images stored in the
Puzzles/ folder.
Custom image upload — players can add their own photos (JPEG, PNG, WebP, GIF) which are saved locally via IndexedDB.
Gallery screen with search, sort (name, recent, custom), and card hover effects.
Eye preview button on each card — click to open a full-screen lightbox showing the complete image and its name before committing to play. A "Play This Puzzle" button launches directly from the preview.
Piece counts: 16, 48, 100, 200, 500, or 1000 pieces (slider + presets).
Rotation toggle — pieces can start at random angles, adding difficulty.
Snap-to-grid — pieces snap together when dropped close enough to a correct neighbour. Snapped pieces merge into a draggable group.
Magnet setting — controls the snap detection radius (Low / Medium / High).
Free-form board — pan and zoom the canvas freely; pieces scatter outside the board edges initially.
Side tray — a scrollable panel holds unplaced pieces for easy access.
| Input | Action |
|---|---|
| Left click + drag | Move piece or group |
| Right click | Rotate piece 90° |
| Scroll wheel | Zoom in/out |
| Middle click + drag | Pan the board |
| 2-finger pinch | Zoom (touch) |
| 2-finger drag | Pan (touch) |
+100 points per correct snap.
Combo multiplier — consecutive snaps within ~3 seconds stack the multiplier higher.
Speed bonus — faster completions score higher.
Best time, best score, and total pieces placed are saved to LocalStorage and shown on the main menu stats bar.
The completed puzzle assembles with a smooth animation.
The full puzzle image is displayed — player must tap "Continue to Results" to proceed.
A win card appears showing Time, Pieces, and Score with confetti and celebration effects.
Options: Play Again, New Puzzle, or Main Menu.
Dark space theme by default with CSS variable theming (light and space variants available).
Animated particle background on the main menu.
Glass-panel modals with blur backdrops.
Procedural Web Audio API sound effects — no external audio files needed. Includes: snap, combo snap, pickup, place, win fanfare, button clicks, hover tones, countdown ticks.
Mute button in the nav bar.
Settings panel in-game for volume, zoom, magnet strength, rotation, and piece count.
Clear Stats button on the main menu footer — resets all stats for a new player (with confirmation).
How to Play modal — detailed in-game guide covering controls, snapping, scoring, modes, and settings.
Save & Resume — puzzle progress is auto-saved to IndexedDB and can be resumed.
Leaderboard — daily challenge scores stored locally.
Pure HTML/CSS/JavaScript — no frameworks, fully offline.
Packaged as a portable Windows EXE via Electron (dist/CoolPuzzle-Portable.exe) — no installation required, no registry writes.
Launches fullscreen automatically.
All puzzle images, audio, and game logic are self-contained.