Hmm, that's unfortunate, sorry about that!
I just tested the web version under Chrome/Firefox and they still work for me, same for the Windows/Dreamcast versions. Is the problem with the web version again? If so, if it wouldn't be too much of a hassle, could you open the debug console (CTRL+Shift+J in both browsers) and see if there is anything weird in the output? For example, this is how it looks for me under Chrome:
![](https://img.itch.zone/aW1nLzI3NDAwNjQucG5n/original/Jqnfn8.png)
If there's another error, something like "couldn't load X" that might help explain it. Otherwise it might have just been because Fighter Hero 4 uses an earlier version of the web environment, the newer ones run better (hopefully). Once again sorry you had the black screen!