I don't know if it's something on my end, but I swear every Unreal Engine entries I see is completely unplayable :(
Out of curiosity, have you tested that the exported version runs smoothly on your machine?
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I'll definitely be looking into this a lot more. I had some of my friends try it, and it seems to be definitely demanding on particular systems, but not due to the difference in hardware performance, but just hardware in general. I had someone with a lower tier rig running it fine while someone with a higher tier rig said they at one point were stuck at the same 5-10fps. Thanks for letting me know though, that's definitely frustrating!