Playable online on itch.io.
This repo is based on the Phaser-ES6-Webpack template by lean here on Github, and is written in ES6. To run the code you need Node and NPM installed. Then you can run npm i in the project root to install dependencies, npm run dev to run a development server that automatically compiles changes to the code and refreshes the browser, and npm run deploy to make a distributable version.
Check out src/states/Room.js, it's amazing. Exactly the sort of hacky nonsense I'm usually incapable of writing at all. Game jams are pretty motivating that way :) (Specifically, try the collision detection and the player falling code. Also note that the player movement is just Ctrl-C Ctrl-V'd from Game.js.)