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Scammers send fake “try my game” links that install viruses or steal accounts.
Don’t download games from random DMs. Only trust official store links. Stay safe!

Yes, in addition to Windows, Spikair Volleyball is compatible with macOS and Linux.
I can check if it's working properly now (since it's still in early access) and if there are any significant defects reported on Linux or macOS, if you'd like.