I would strongly advise not to install some code you haven't checked.
That doesn't mean you or the OP mean anything bad, it's just a general advise.
The problem can be easily solved with changing the renpy renderer.
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- Hold down Shift while starting Ren'Py, or press Shift+G once Ren'Py has started.
- From the "Graphics Acceleration" menu that appears, choose the renderer to use.
- Choose "Quit", then restart Ren'Py.
Choose angle2
It's true that it's always good practice to use websites like virustotal to get files from unknown source checked by a bunch of antivirus :
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for that file case you'll see only 2 of the 65 antivirus flag it
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and those 2 are rather dodgy antivirus :
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But still it's a good rule to never trust a file from someone you don't know.
Now for the angle/opengl display change, it will not fix the problem that is explained by the user gojira667 on the post i linked previously, it is fixed by the later version of renpy ( 8.1.3 and later) that actually incorporate the same MMX enabled libraries that gojira made available for 8.0.3 (that did not have them by default)