Interesting game
The first guardian movement is straightforward so as long as we are not in it's straight or diagonal path, player will be fine. Good intro boss
The second boss is kinda too much compared to first boss so if you plan to continue this further, I think adding in between them will be better.
and then, for the browser, if possible can you add lock mouse within the window?
sometimes my mouse click the close button accidentally :"D
The animation is really good but maybe add some indicator that player attack is still in cooldown