I thought this was a broken game it first, luckely the comments said it works. So I went into the GDD and figured it out, but you really need a tutorial, or a description on your Itch.io page at least!

The game itself is cool, matching the colors to the enemies is a nice mechanic, the pulse also, especially when it goes fast enough to match the music (if you could always make it match that would be great). 

Picking the colours was hard sometimes, and seeing when an enemy hit you too, there are a lot of visual clarity issues you could fix!

But nice project, it works and it's playable :) 

I liked the concept for this game, combining different colors for different enemies is a cool idea. But i think game lacks a bit of variety. For example i would like it if enemies have different behaviours depending on their color, like red ones are more aggresive and orange ones are more defensive etc. But overall this is a good prototype, good job!

It took me a while to realize what to do, I had to read the GDD to understand it. I like the concept, with some complexity and polish, this can be a fun game.