If people don't click the "support this game" button, why would they click a link to Ko-fi?
because my game page dont show "support this game" button, instead show "download" , my game is a browser game but have windows version too, but mostly people is playing on browser
maybe i should only keep the windows version?
Maybe you should give them reasons to download the Windows version, and support you while at it.
https://itch.io/games/top-sellers/platform-web
Look at these examples.