Neon Caverns is described by its author as a browser-based 2D platformer built with Limn Engine. The game article reports three levels, coin collecting, enemies, moving platforms and a boss fight, with keyboard and touch controls. The demo’s current availability and the release status of the complete source code are not confirmed by the available articles.
What is Neon Caverns?
Ileventech’s September 18, 2026 article introduces Neon Caverns as “a neon-lit platformer with 3 levels, a boss fight, and a full scene system — built entirely in the browser with Limn Engine.” That is the article’s description, not an independent test of the game.
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The stated objective is to collect coins, avoid enemies and spikes, and reach the boss. The article says players begin with three hearts, lose one when hit by an enemy or spike, and can defeat red-square enemies by jumping on their heads. It describes the boss as having multiple health stages and says it can be attacked by jumping on its head. Ileventech’s game article
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The game article names three levels and describes a progression in difficulty. Its feature descriptions are publisher-reported rather than independently verified.
#1 Best Overall
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| Level | Reported details |
|---|---|
| Caverns | Named as the first of the three levels; other level-specific details are not stated in the article. |
| Towers | Named as the second level; other level-specific details are not stated in the article. |
| Boss Arena | Named as the third level and associated with the boss encounter. |
The article also reports patrol enemies that detect and chase the player before returning to patrol, moving platforms, spikes, coins, and menu, gameplay, game-over, win, pause, settings and level-select scenes. Ileventech’s game article
Controls
The game article lists these controls:
| Action | Keyboard | Touch |
|---|---|---|
| Move left | A or Left Arrow | Left control |
| Move right | D or Right Arrow | Right control |
| Jump | W, Up Arrow or Space | Jump control |
| Pause | Esc or P | Pause control |
The article says the game runs in a browser without a download, installation or sign-up, and describes it as playable on phones and desktops. Those access and compatibility statements have not been independently tested here. Ileventech’s game article
Rank #2
- A variety of playable characters are available, some with unique attributes that affect gameplay and platforming physics.
- Younger and less-experienced players will love playing as Toadette, who is brand new to both games, and Nabbit, who was formerly only playable in New Super Luigi U. Both characters offer extra assistance during play.
- Multiplayer sessions are even more fun, frantic, and exciting thanks to entertaining character interactions. Need a boost? Try jumping off a teammate’s head or getting a teammate to throw you.
- Features a wealth of help features, like a Hints gallery, reference videos, and a Super Guide in New Super Mario Bros. U that can complete levels for you if they’re giving you trouble.
- Three additional modes—Boost Rush, Challenges, and Coin Battle—mix up gameplay and add replayability, while also upping the difficulty for players who want to try something harder. Players can use their Mii characters in these modes.
How the Limn Engine walkthrough describes the game’s structure
The author’s walkthrough presents Neon Caverns as a scene-based game. It describes selecting numbered scenes through a display.scene value and assigning components to the active scene. The game elements it identifies include a player component, tile-based ground and walls, spikes, coins, HUD elements, patrol enemies, a boss and moving platforms. The walkthrough says custom enemy and boss classes extend the engine’s Component class. Ileventech’s game article
A separate DEV Community deep dive describes an implementation organized around scene constants, global game state, custom classes, scene-building functions and scene update functions. These are explanations of the author’s approach; they do not independently establish how the game behaves at runtime. DEV Community source-code deep dive
Rank #3
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Can you play it now, and is the source code available?
The September 18, 2026 Ileventech article says the game is live on Limn Arcade and that the full source code is still underway. A DEV Community article links to a demo and a GitHub repository. Those statements do not establish that the demo still loads today or that the complete source has since been released. Check the linked destinations for current access and repository contents before relying on either claim. Ileventech article · DEV Community demo and source-code deep dive
Quick Recap
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