I'm having a bit of trouble wording this, but I can think of a few improvements to your game. I can also implement them and have some of the code that would be necessary already developed. Some of the ideas I have in mind are:
- Allowing the user to use files from anywhere on their PC (this is relatively simple but requires using electron which means that there would need to be a different browser version than the local version)
- Allowing the user to see all previous images (really easy to do with local files but not sure about files from the net)
- Moving the progress bar to the side and adding a slider for font size (in turn, this makes the pictures larger)
- Adding perpetual image loading which can load more images than just the next one. That would probably have to come with a slider so that the user can set how many pictures ahead they want to load. They would still load one at a time (once again, this is easy with local files, but I am not sure for files from the net)
- For local files, add lazy loading or something similar (reduces initial loading times while still loading things fast). I am not sure if you already have this feature because I haven't used the game locally
I can probably add more stuff as it should be mostly easy. The only problem is integrating my code to your game as I can't read most of the code you've written because it uses $ which I don't understand, and I would also need to separate the functions to make it easier to read. Also, I have no clue how to load images from the internet. Additionally, I don't know how to use jQuery. However, I can do all those things above without it so long as I can treat the files from the internet the same as I do local files. If you are interested, just let me know.