FUSE/GRID
INSERT COIN. Light the fuse, clear the room, don't stand in the blast.
Fusegrid is a single-player bomb-grid arcade you play right in your browser.
Flip REAL 3D ⇄ CLASSIC 2D (or hand-pixelled PIXEL) whenever you like, dial
the Heat to CORE, PLUS or MAX, and blow your way through eight rooms of
bricks, foes and chiptune.
No install needed, no account, no server. Just press start.
Sharing the link? Keep the trailing slash:
https://hmarzban.github.io/fusegrid/. The no-slash redirect drops the
Open Graph tags, so chat apps show no preview card (og.png, 1200×630).
🕹️ How to play
The one rule: clear every enemy in the room to advance.
- Gold WALL never breaks. Green BRICK breaks, and stops a normal blast.
- Floor cubes lie in the open and hide under bricks: more bombs, longer
flames, kick, throw, remote, shield and more. Grab them.
- Take a hit and you lose a heart, but the room keeps going. Any bombs and
blades already lit stay lit, so step lively.
Controls
| Input | Action |
|---|
| WASD / arrows | Move |
| Space (or J / X) | Place bomb |
| Shift + Space | Throw (needs THROW) |
| Q | Detonate remote (needs REMOTE) |
| Walk into a bomb | Kick it so it slides (needs KICK) |
| R (in a run) | Reset the camera and zoom |
| P / Esc | Pause (RESUME / RESTART / OPTIONS / QUIT TO MENU); ↑↓ + Enter pick a row |
| M (paused) | Quit to menu |
| Space / Enter (end screen) | Next room, back to the menu after the finale, or a new run after GAME OVER |
| C (end screen or STATS) | Copy your result or your stats as text (both say COPIED, or COPY FAILED) |
| B (end screen) | Copy the board's challenge link (the end screen says BOARD LINK COPIED) |
| T (STATS) | Open the MEDALS page |
| R, R (STATS) | Reset my cabinet (two presses; any other key cancels) |
Menus run on the arrows, Enter and Esc. Powers marked * in the in-game
HOW TO need their pickup first.
On a phone or tablet, a virtual D-pad and bomb button sit off the board.
In portrait they dock low in the thumb zone (the board centres on the menus and
slides up under the pause button during a run). In landscape they sit in the
side gutters, with pause above. Holding THROW or REMOTE? A matching button pops
up beside the bomb button (in the right gutter in landscape). STATS's MEDALS,
Copy and Reset labels are tappable too.
Want the full cast of pickups and foes? Open GUIDE → ITEMS / ENEMIES in the
game. The cabinet explains itself, and its wording comes straight from the
game's own item table, so it's never out of date.
🗺️ The run
Eight rooms
| Room | Look | Notes |
|---|
| 1 | JUNGLE | Bright grass, gold stumps |
| 2 | ICE | White cubes, navy cliffs |
| 3 | FACTORY | Amber crates, steel |
| 4 | WATER | Teal sewer / ruins |
| 5 | ARENA | Night court, rose bricks. Finale on your first run |
| 6 | SAND | Ochre dunes (unlocks after your first CLEAR) |
| 7 | VOID | Violet dark, tall cliffs (unlocks after your first CLEAR) |
| 8 | CROWN | Gold court. Finale after unlock (unlocks after your first CLEAR) |
Every room has its own chiptune theme and its own blast tint. Fresh installs
show rooms 1–5 only. That's the gate, not a bug: beat room 5 and the map grows.
Turn up the Heat
On LEVEL SELECT, ←/→ picks the room, ↑/↓ picks Heat and [/] picks pace
(EASY / NORM / HARD). Enter starts, Esc backs out.
| Heat | What changes |
|---|
| CORE | The baseline run (baseline v6, the replay reference) |
| PLUS | Harder spawns and a tighter fuse |
| MAX | Highest pressure |
The attract demo always runs CORE with every MODE off, whatever you picked last.
Stack the MODES (after your first FUSE/GRID CLEAR)
Clear room 5 once and LEVEL SELECT also offers four optional MODES,
each a voluntary handicap:
| Key | Mode | Rule |
|---|
1 | IRON | Start with one life |
2 | BARE | No walkable floor cubes |
3 | THIN | One fewer buried cube under breakables |
4 | SHRINK | Arena walls close inward over time |
5 adds TIME: a play-only stopwatch with a per-room best. A CORE run
with every MODE off is bit-identical to baseline v6.
Score
The live HUD shows raw points. HIGH SCORES saves Heat-scaled totals:
CORE ×1, PLUS ×2, MAX ×3.
✨ What's in the cabinet
- The opening. A FUSE/GRID title waits for any key or tap. That press drops
the music and a ~4 s show that blasts the menu open. Any key skips it.
- A new board every run. Every PLAY, restart and GAME OVER retry deals a
fresh board; losing a life keeps the one you're on. Each world has its own
bold room shape (fourteen in all), and you start sealed in a brick corner
with every foe at least 10 steps away. Every board passes a fairness check
before you see it.
- Three looks, one game. OPTIONS → RENDER cycles CLASSIC 2D (Canvas),
PIXEL (hand-drawn sprites over the same board) and REAL 3D (WebGL), live, no
reload. REAL 3D frames the whole board from one 3/4 camera; wheel or pinch to
zoom, and zoom snaps back to your CAMERA preset every room. OPTIONS also
holds music and SFX volume, the 3D camera preset, brightness, screen shake
and reduce-flash.
- GRAPHICS. One page (under OPTIONS, and in the pause menu) for look versus
frame rate: QUALITY BATTERY / AUTO / HIGH in one press, or tune FRAME RATE
(30 / 60 / MAX), RESOLUTION, SHADOWS, ANTI-ALIAS, EFFECTS, DEMO and an FPS
METER yourself (CUSTOM). Game speed never changes. Menus and pause idle at
30 fps, and audio sleeps while the tab is hidden.
- Pickups that talk back. Every pickup floats a label with your new value
(
FLAME 4, MAX, or replaces … on a bomb swap) and pulses its HUD chip.
An ability bar along the bottom of the board lists the powers you hold.
- Coach. A ghost demonstrates your first bomb on a fresh install, then you
get one short tip the first time you grab KICK, THROW, REMOTE, PASS, LINE,
POWER, PIERCE or SHIELD. Once each, ever.
- Run summary. GAME OVER and the finale show your tally and a delta
against your saved best for that Heat: NEW BEST, FURTHEST ROOM YET, MATCHED,
or how far short you fell. Combo callouts and a close-call flash fire during
play (both respect reduce-flash).
- DAILY. One board a day, seeded from the date. Your tries and your best
for the day stay on this device. Nobody is ranked; it's you against you.
- Challenge code. On the end screen,
B copies a twelve-character board
code (seed, Heat, MODES, pace and which board maker built it, never a score;
F2 codes are the new mazes, F1 codes keep the original boards). Open
…/fusegrid/?code=XXXXXXXXXXXX to play that same board.
- Ghost. On a DAILY or challenge board (the boards you can play twice),
clear a room faster than ever and replaying that exact board (same seed,
room, Heat, MODES, pace) races a translucent copy of your best
route, in every look.
Everything the game remembers lives in your browser's local storage. There is
no account, no server and no global ranking. The game asks once whether to
share play stats through Google Analytics; nothing is sent unless you
allow it, and OPTIONS → ANALYTICS changes your mind
(privacy).
📲 Install
- Browser: hmarzban.github.io/fusegrid/
- As an app (PWA): use Install app or Add to Home Screen in a
supporting browser. The first visit precaches the game and needs network;
every visit after that works offline. (iOS: Add to Home Screen, 16.4+.)
🛠️ Build it yourself
No bundler, no build step and zero npm runtime dependencies. It's plain ES
modules, and Three.js r160 is vendored for REAL 3D only. You need Node.js 26.
git clone https://github.com/HMarzban/fusegrid.git rollblock
npm start
Then open http://127.0.0.1:8080/index.html. Run the whole test suite with:
npm test
Under the hood the simulation is deterministic: same seed, same inputs, same
outcome, in Node and in the browser. Read on:
Everyone in the arcade follows the Code of Conduct.
📜 License
MIT. See LICENSE. Three.js r160 is vendored under MIT in
vendor/three.module.js.
Source: github.com/HMarzban/fusegrid.
The public game is Fusegrid; a local checkout is conventionally named
rollblock.
GAME OVER? Press Space. One more run.
