I like the gladiator vibes! If I had to offer any feedback, I’d say to start the waves slower and ramp up gradually with health pickups. I die extremely fast (maybe skill issue, lol). Giving the player time to settle in might stretch the gameplay out a bit more.
The environment could use a little more life too, if I had to nitpick. I see that you used some premade assets for the environment (no shade, we’ve all been there.) If you're interested in streamlining original artwork into the game, I wrote a pixel editor that would make light work of it. Let me know if that sounds useful :)