I just went through hell’s fires figuring out how to load an Inform 7 file with graphics to play online on Itch. It is doable.
If you do have graphics, you need to download the file from Juhana’s post #19 in this thread and follow the directions in that post. It will then upload, graphics and all, to play on Itch.
Not sure about sound, though. Easy enough to see if it works.
You can also try Borogove.io for playing online. That has also worked for me with graphics, but again, not sure about sound.