I noticed that I stupidly forgot to update the game here on itch.io when I updated it elsewhere. The more recent version doesn't use a batch file to launch, so perhaps try redownloading the game and seeing if the issue is fixed. If so, I suspect it was an issue with how Windows 8 handles the environment of executables launched from batch files (if the .exe inherited the environment of the .bat then all of the paths to stuff like images and even the font file become invalid and the game can't load them).
If you want you could try running the game .exe itself, without using the convenience .bat file, and see if that fixes the problem. If so, then I've learned something, and if not, then let me know so I can keep trying to figure out what's going wrong. Thanks for the feedback!