Please let me know the proper way to upload bug fix if we have one?
I am guessing both of below works
1. We can upload a revision of the game through "Upload files" button.
2. We can use butler to create patch then only the patch will be uploaded.

Thanks for trying :)
I looked at your game page and I am not sure.. but it does seem working with multiple files uploaded ? Just that perhaps file naming is important since it is difficult to know which one is the newer one (I am guessing based on convention, higher number will be the newer but for some reason i noticed the Window sign is on the first two while not on the second two uploads. So is this a Window's game? I wish I can try (I switched to Linux this year after many years on Windows..), graphic looks nice though on the screenshot.

Hi, I've noticed in other jams, that if bugfixes are allowed, they normally ask that you leave the original jam build up during the voting period.
As you seem to be doing a web build and can only have 1 web build active at a time, you could upload the original build as a Windows or other OS build that can be downloaded, or just leave the original zip file up so it can be seen that you've made changes.
If you plan to upload another version, I would recommend explaining on the page or through a post what changes were made between the w versions.