Thank you for taking the time to give it a try! I'm sorry to hear about the visual errors. I'll see about replicating it when the jam is over.
It's all good, if you're looking to replicate it, it may be useful to know that I ran the game in a Firefox browser on an ubuntu machine. Here is a video showing what the game looked like to me:
I didn't take this into consideration when rating because my laptop is not powerful and my choice of browser and OS may have influenced this as well. But the constant glitching was an eyesore and made it harder to enjoy unfortunately.