Mobile is actually technically already supported in the code I wrote, the issue is that it doesn't propagate touch events in WASM builds - and the only workaround I've found is building a JS thingy that sends the events into the WASM code, but that simply isn't in the scope of a 48hr game jam.
That said, the underlying issue is likely to be resolved sooner rather than later!
Yeah, that should even be possible as far as I know - however I have so far never built Rust for Android or iOS and know next to nothing about packaging for these platforms either.
That said, the web build is known to work minus the input issue, so I'd honestly just stick with that & rebuild it once there's a fix for it upstream
Edit: I just wanted to check if I've subscribed to the GitHub issue [I forgot as it turns out] and it appears to be resolved; I'll update it once the voting period is over
