Yes, the online version on this page is an old version. Itch.io only allows online files up to 500MB, so I can’t upload the newest version here. To play the most recent update, you’ll need to download it, as mentioned in the warning at the end of the page.
But there is websites like mopoga e nothing games that made web version of the recent version, i just must warn that i dint made theses port myself.