30 playable stages
Cursed temple gates, soul absorption, weapon loadouts, elemental swords, items, clash combat, and Genma demons — with bosses at stages 10, 20, and 30.
HTML5 Canvas · Vanilla JavaScript
Demon Gate — HTML5 Canvas Action Game Source (30 Stages)
Demon Gate — original feudal action browser game (NOT affiliated with any existing franchise).
WHAT YOU GET (instant download ZIP)
✓ Full HTML5 Canvas source — vanilla JavaScript, no framework lock-in
✓ 30 playable stages with bosses, ranks, and soul/weapon progression
✓ Procedural Web Audio — no royalty-bearing music files
✓ Zero external image assets — deploy anywhere static files work
✓ Commercial license for ONE project (see LICENSE.txt)
✓ CUSTOMIZE.md — stages, enemies, controls
PERFECT FOR
• Indie devs learning action combat systems
• Agencies delivering a branded browser mini-game to clients
• Portfolio / landing-page engagement hooks
• Sellers who customize for clients (not redistribute raw source)
TECH
HTML + CSS + JS | Works on Vercel, Netlify, GitHub Pages | ~68KB ZIP
LIVE DEMO
https://ship-project-kappa.vercel.app/demon-gate/
Full 30-stage browser demo (English UI; add ?lang=ja for Japanese).
LICENSE
Single commercial project. No redistribution of source as-is. Full terms in LICENSE.txt.
Support: customization guide included. Custom development available — message seller.
- Instant ZIP download
- No build step required
- Zero external image assets
- Commercial license included
Built for indie devs & agencies
Ship a branded browser mini-game without Unity, Godot, or Phaser lock-in.
Vanilla JavaScript
HTML5 Canvas + procedural Web Audio. No npm install, no bundler, no game engine. Upload to Vercel, Netlify, or GitHub Pages and play.
Procedural audio
SFX and BGM generated in-browser — no royalty-bearing music files to license or replace.
Zero image assets
Everything renders on Canvas. ~5 MB ZIP deploys anywhere static files work.
Performance Lite mode
Built-in HUD toggle lowers GPU load for weaker devices — great for landing-page embeds.
English UI default
Japanese available via ?lang=ja. White-label ready with CUSTOMIZE.md guide.
What's in the ZIP
Everything you need to deploy, customize, and ship under a single-project commercial license.
Download now — $29| File | Purpose |
|---|---|
| index.html | Game entry + start screen |
| css/style.css | UI styling |
| js/game.js | Game logic (~30 stages) |
| js/audio.js | Procedural Web Audio SFX/BGM |
| CUSTOMIZE.md | Stage, enemy, and control edits |
| LICENSE.txt | Single-project commercial use |
| BUYER_README.md | Quick start deploy guide |
FAQ
Can I use this in a client project?
Yes — LICENSE.txt grants commercial use for one project. You may rebrand and deploy; you may not redistribute the raw source as-is.
Do I need a game engine?
No. Pure HTML, CSS, and JavaScript. Open index.html or upload to any static host.
How do I customize stages and enemies?
Edit STAGE_DEFS in js/game.js. CUSTOMIZE.md walks through stages, enemies, controls, and audio.
Is there a live demo before I buy?
Yes — play all 30 stages free at https://ship-project-kappa.vercel.app/demon-gate/.
What about support?
Self-contained template with documentation included. Custom stages, art packs, or retainer development available — contact the seller via your purchase receipt.
Ship your browser action game today
Instant download. Deploy in minutes. Own the source.
Buy Demon Gate — $29