Sorry for not looking into this sooner but, from what i can tell it looks like a hardware/graphical problem. I'm not a tech wizard so i'm not much help. I think i recall having a similar problem a long time ago, when i played it on a now very old laptop. If it was me i would test some settings and look at other things in the OS, like trying compatibility modes. I don't know your hardware specs, even if i did i'm not sure i could help you with it. I wish you the best of luck if you still want to try and fix it.
If you want to become a moderator for this game let me know. You can edit the rules or make any change you see fit.
(edited) I'm not all that active doing runs anymore. So i'm not regularly checking in to see new submissions, only over longer periods of time.Therefore i think that a second moderator checking in would be a good thing to have. Also someone who is more into doing runs for the game moderating the page, would be great to have. when and If i get back to doing runs then there's not a problem.
I can make categories for each difficulty if you want me to. But it does not seem to be a significant difference between the different difficulty levels as far as i know. I would just recommend picking the easiest difficulty level. You are free to choose whatever difficulty you want, i will group them with the others unless someone wants otherwise.
I do apologize for the late answer, i'm not very active here.