on the main page the download contains 2 files. Rush2.tap is what you need
I realise that, but that file is dated 34 days ago and is the same as what I downloaded a month ago – whereas I got the impression from this announcement here (dated 20 hours ago) that there'd been a recent bug-fix (i.e. today). Perhaps I misinterpreted that based on updates of this webpage text on itch.io. Apologies if so.