Unity security patch applied

Updated this little game with a quick rebuild to apply a patch by Unity, who recently discovered a security flaw in their engine from version 2017 and onwards. They do not believe anyone has exploited it, and it's only applicable in very specific circumstances that I very much doubt my little game would be used in.

Still, better safe than sorry, so I've applied the change and uploaded a new version of the game. Unless Unity has broken something, it should be largely identical to the old one, barring replacing mentions of Twitter with Twitch and Bluesky (which considering the game might be appropriate, at least).