Running
Windows
You may need to whitelist the executable in your antivirus.
Mac
A Mac package is also available.
Linux
A deb package is available for Ubuntu/Debian users.
A standalone executable should work on most distros. If it does not, see Running with LOVE.
Running with LOVE
You can run the love file game with love psycho-the-ball.love if you have LOVE installed. The recommended version is 0.10.2 and it can be downloaded here.