Fun game, loved the difficulty curve, and the fact your character is faster than the others but it doesn’t make you too strong, it only allows you to compensate for being alone.
2 technical things to improve outside of the game itself. I suppose you use an “older” version of unity, there is an option inside ProjectSettings>InputManager>Use Physical Keys to enable non QWERTY users to have the same keys disposition without having to adapt your code to use Z instead of W for example.
The other one is when you export you web build, the default resolution on the itch page is 960600. If you change it to 960660 there will be a bar below your game to enable fullscreen, currently the bottom of the game is a little bit cropped.