It's quite common for Ren'Py (and other) games to get flagged as false positives by certain antivirus software. More information on this can be found on the lemmasoft forums (The official Ren'Py support).
We're not really sure what to say about it "screwing up" your computer as the version we've uploaded has tested fine with others.
We have a few questions to determine what could have caused such a thing:
- How did you download the game?
- Direct Download from itch.io
- Downloaded via the itch.io app
- The mediafire link
- Desura (currently defunct)
- Another location that we are not aware of
- In what way was your computer "screwed up"?
- What operating system are you using?
- What antivirus software are you using?
- What exactly happened when you attempted to run the game?