Thank you for the advice. I removed as much as I could from the project and ran the file through several online ZIP compression tools in order to reduce the size, and I ended up being just barely too big to upload. I am currently running the build through the Unity "Disk Size with LTO" option, which advertises itself as being the option that creates the smallest build possible, but it also says that it can take up to several hours to build. Does anyone have any advice for any effective tools that I can use to reduce the ZIP file size as much as possible? I used the top results from my Microsoft Edge search, so I wouldn't be surprised if there are better ones out there.