Interesting concept, but the controls feel a bit clunky and limited—you can only attack left or right using just a sword, and you take unavoidable damage, making it nearly impossible to survive for more than two minutes.
The game is genuinely interesting, but it needs a lot of improvement. I’d like to offer some small suggestions: First, make attacks work with the left mouse button—it’s more intuitive and comfortable. Second, consider making attacks circular so players can control crowds better, reducing unfair situations. Adding more weapons and some special abilities would help a lot too. Also, a shield is a must. How you implement it is up to you—whether it’s a button press or a perk—but it’s definitely needed.
Sorry for giving so much feedback, but I really see potential in this game and just wanted to help, even if only with words!