Here's a prototype using the library pixi.js to make a web based game, it's got movement tied to the music but in this iteration at least you don't need to press in time with the music, just hold the arrow key in a direction. The enemy moves on the off beat. A challenge with web technologies is getting the music in time with the gameplay which I have not managed here since the game doesn't wait for the music to load in before it starts the game. Still a good example of a playable tile based game in the browser though.
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