This is pretty great! It took me some time to really get the flow of the game, but once I did, it all clicked. The trick is to know your arsenal well; you won't get far if you're not totally focused on your build. Another thing I appreciated about the user's abilities were the boosts on the 1st and 3rd beat; that was a smart idea to add more depth to the gameplay.
It was also nice to see each of your abilities being used by the enemies (or are you the one copying from *them*? Hmm...) That showed me a different perspective on how they could be used, painting a fuller picture than if I was just using them instead of also being on the receiving end.
I only had a few issues - one is that the purple rings look like power-ups instead of traps if you're not already aware they hurt you; maybe making them red or spikey could help with that. The other is that I couldn't rely on the hitbox for the slashes; fairly often, I'd run into situations where the slashing animation cut clean across an enemy, but it did no damage.
All in all, there was some really thoughtful design work done here. On top of what I mentioned above, the music and art was enjoyable, and blended really well with the game. Oh, and my build was arrow, dodge, dodge, slash - that rhythm made the most sense to me personally, and maybe it'll work for anyone else who's been struggling!