Volt M | Construct 3 | HTML5 Slot Game with Node.js Backend

Volt M is a mad-scientist laboratory HTML5 slot machine game made in Construct 3, shipped together with an optional Node.js + MongoDB backend for server-side game logic. It is a 5-reel, 3-row video slot with 20 paylines, a Wild symbol, scatter-triggered free spins with retriggers and four levels of win celebration: Big Win, Mega Win, Super Mega Win and Epic Win, animated with Spine. Out of the box the game runs 100% in the browser – just upload and play. When you are ready for server-authoritative gameplay, the included backend moves spins, balances, free spins and history onto your own server with persistent MongoDB storage.FEATURESVolt M 5×3 reel grid with 20 paylines Volt M 6 paying symbols – ray gun, pressure gauge, potion flask and neon A / K / Q – with editable payouts (3, 4 and 5 of a kind), a plasma-orb Wild on reels 3-5 and the Professor as Scatter Free Spins: 4+ Scatters award 15 free spins, 3+ Scatters during free spins add +5 Big Win, Mega Win, Super Mega Win and Epic Win celebrations (Spine animations, count-up, tap to skip) Animated win lines with line-by-line win display Turbo mode, Auto Play (up to 1000 spins or unlimited) and Space key to spin Volt M 9 bet levels, spin history (normal spins and free-spin sessions) and in-game rules / paytable Sound and music volume slidersVolt M 16 languages: English, Arabic, Chinese, Finnish, French, German, Hindi, Indonesian, Japanese, Korean, Polish, Portuguese, Russian, Spanish, Turkish, Vietnamese Social-casino (sweepstakes) mode with compliant wording (“Play” instead of “Bet”), switched on by a URL parameter Easy-to-tune math: weights, paytable, paylines and free-spin rules in one readable config file (the documentation includes a ready-made 95.5% RTP paytable) Responsive layout for desktop, tablet and mobileHTML5 game playable on all platforms (PC, Mobile, Android, iOS) Beautiful graphics (you can easily reskin according to your design) Made in Construct 3 – full source project (.c3p) included Mouse, Touch and Keyboard ControlsNODE.JS BACKEND (INCLUDED)Server-side game logic: the server generates every spin, evaluates the win and charges the bet MongoDB persistence: players, balances, free-spin sessions and a record of every spin with a transaction id RESTful API: init, spin, balance, config, RTP, free-spin session, history, stats and debug endpoints Free spins are owned by the server – they survive a reload and resume after a disconnectRTP control: the server calculates the exact theoretical return of the configuration and can scale the paytable to a target (for example 96%) Debug tools: one JSON file per spin, a spin-log viewer and an API test page Ready-made backend-integrated .c3p (VoltM_BE100) – no manual wiring needed, just set your server address Three guides included: setup, Construct 3 integration and full API referenceTECHNICAL REQUIREMENTSVolt M Standalone game: any web server or shared hosting that can serve static files (Apache, Nginx, IIS, etc.). No PHP, no database required. Must be served over http:// or https:// (not file://). Modern browser with WebGL.Backend (optional): Node.js 18+ and npm on a host that can run Node processes (VPS, Render, Railway, Heroku, etc.), plus MongoDB (local or free MongoDB Atlas cloud).To edit the game: Construct 3 (r476.3 or newer) with a paid subscription to edit and export the included .c3p source, plus the free third-party “Better Outline” addon by skymen (installed via the Construct 3 Addon Manager).Mobile export (optional): Android (Cordova) / iOS (Cordova) export via Construct 3.Note: the exported engine scripts (c3runtime.js, main.js, sw.js, etc.) are auto-generated by the official Construct 3 exporter; the original readable source is the included .c3p project (event sheets plus the game’s JavaScript modules, which are also exported unminified in scripts/project/). The backend ships as plain, readable Node.js source files. spine-player.min.js is the official Spine Web Player by Esoteric Software, included unmodified.