Fun very old game. In my opinion scripting is mandatory, which makes it an idle game:

(press f12 and paste this into console, you change that 100 to make attacks slower or faster)

const myInterval = setInterval(myTimer, 100);

function myTimer() {

for (let i = 0; i < 10; i++) { document.getElementsByClassName('enemy-container')[i].firstChild.nextElementSibling.nextElementSibling.firstChild.click() }

}