Interesting concept, but somewhat unintuitive. You might want to explain how to play a bit at the very beginning, because it can a bit difficult to get thrown straight into the game without even understanding how to get to the 'start' button.
As a rl musician, I think the long stretch in 2-X is a little too long. It is very hard to maintain offbeat for a long time without something to break it up. You couldn't add in more twists or something?
Would be nice to have some simple upgrades. eg 1 kill = 5 coins, coins could buy you bigger sword (hit a larger area when you thrust), faster walking speed, further area travelled when you thrust, etc.
I liked the mobile version, so I was surprised to see this on kong. Good job on this game, although I feel that this was better on the web rather than on mobile (for example, we can hover over items in the shop with the cursor but it's harder to see item cost on the mobile version).