The packages are required by the engine for the game to run on linux. I've done a quick google search and they seem to be available for redhat (so it should work on fedora, right?)
https://rpmfind.net/linux/rpm2html/search.php?query=libcurl4
https://rpmfind.net/linux/rpm2html/search.php?query=libopenal.so.1
I'd also like to mention I've only tested the linux version on Ubuntu 18.04 as that's the only "officially" supported distribution by gamemaker. I did mention Ubuntu in the minimum requirements on steam page but forgot to do it here too. Sorry about that.
If I were you I'd try to get those two packages installed but if you can't do it, it seems itch allows refunds if you email their support.
If you do get the game working, please let me know what fixed your problem as it could help other fedora users.