Sorry, for the background music volume resetting, a quick look at the coding and I see that it's different. I think I know how to fix it and what to adjust. I'll look into it and hopefully it'll be fixed by next update but it'll have to be tested by others to be sure.
For the save name feature, people have different size screens, so I try to accommodate as many as I can. I'll try to adjust the save box with more space. If you don't care about naming your save file, you can just leave it blank and press enter. I'm not sure there's a way to make it optional otherwise.