While I normally like your battle descriptions, in this case the extra syllables in Argentina and Argentine threw me for a loop. Would that be how the Brits pronounce it?

WHAT THE F&^@*$ IS WRONG WITH "EPOCH"!?

It makes me feel like I'm watching Nyan cat again

I'm personally offended by your idealistic expectations for cat eye and ear proportionality >:(
My pic stays just as it is :3

Srsly tho, gud game but I felt like there was some wonkiness with having things occasionally expanding way more than I would expect for subtle mouse movements. In case you do more games like this, would prob tweak the approach to calculate percent change in size vs mouse movement.

I haven't actually played the game yet and will change the rating after I do, but I saw the comment about Unity losing save data when you update. I came up with a solution to that issue, and if you're saving data in PlayerPrefs I posted source code for a class to override it to keep web builds from change the saved data location when you update games - it's designed to be easy to just copy/paste into your project and let you specify a directory where you want data saved persistently from now on. If you're not using PlayerPrefs, this also includes a description of why Unity's web builds are suck when it comes to saving data and why this solution works, so it should be easy to cannibalize the code to use in your game. https://3p0ch.newgrounds.com/news/post/1086279
I wrote it four years ago so check the comments in case anything has changed with Unity web builds since then (I've become a Godot convert in the meantime).
Be aware that if you implement this, it will lose everyone's save data when you push that update, but for any more updates in the future the save data will persist. So it would only make sense to push if you might plan for more than one update. Or of course to include in any future web games.

I've played now and gud game, but I got the feeling that sometimes the double-jump got triggered when the player was still on the floor? I docked a half-star for that, but then added it back when I saw that raindrops on the main menu splatter when they hit the mouse cursor.

It's possible with 128 moves

Disclaimer: I admit IDK squat about dubstep. That said, my main critique is that this sounds like a series of great hooks that are done sequentially but without seeming like they're really part of a cohesive song. Maybe this upload is meant to be just that, and more of a teaser than a typical song, but I think it'd be a lot more memorable if it had like a chorus or something that I could point to and say "ah, that's the part that people will recognize as being this song". That said, these are great hooks and could probably be fairly easily turned into such a song if you wanted.

I'm blown away by the effect those bells created and I've lost count of how many times this has looped by now. Nice job, man.

I really like the ambient background effects. At 0:45 the lead keyboard switches from its intro to playing a melody of all whole notes; I definitely prefer the former to the latter. The melody is nice for a few measures, but it soon seems like there ought to me more complexity to it. Going back to an approach like in the intro seems appropriate at that point. If the keyboard is really meant to play more of a background role than a lead at that point, maybe back off its volume or increase the volume of the other instruments to let them shine through more.