Ah I misunderstood the formatting, sorry for that.
I took a look at the butler command you provided. Have you taken a look at the documentation of how to use butler’s “push” command? It is here: https://itch.io/docs/butler/pushing.html
Based on that documentation and the command that you posted, you are missing the “user/game:channel” argument, which tells butler who you are, and which game of yours should the build be applied to.
In your case “user/game:channel” should be something like “simulatoralive/bigblockengine:linux”. I used “linux” as the “channel”, but feel free to pick your own.
Let me know if this was the issue, also if you are replying to me, please use the “Reply” button on my comment, so that I get a notification and I can reply to you. I accidentally found this response by checking up manually if there was any update :)