Thank you for playing and for telling us about this issue!
If it's not too much trouble, could you make a video of the bug? I can't replicate it on my end (or on my roommate's laptop with similar specs hehe). I have a theory that it may be tied to issues at different quality settings, but I'm not 100% sure. Could you try launching the game at a different quality setting (I was playing at "High" on my roommate's computer) and tell me if that changes things?
Okay I was able to get a recording. It looks like it gets worse if I have background processes going, so the bug occurs a lot sooner because of the recording software.
It's likely that my computer just can't handle the graphics. I tried different quality settings, but they don't seem to make any difference on the frequency or severity of the bug. I also don't see any visual changes, they all look like the same quality to me.
However, I was able to get it to run smoother and progress farther by lowering the resolution. 800x600 got me farther than ever, but I did eventually get stuck at some sort of drawbridge section after collecting the first few coins. Any resolution lower than that, I ran into a new bug where I can't jump as high, so I can't get past the first few hurdles. The jump seems to get shorter and shorter as the resolution gets lower.