Hi,
beside having a weekly megasale of the game, I've also uploaded in the beta branch the version 1.3.1, which uses new libraries of my framework, so should run faster and resolve some compatibility problems.
The game itself is identical but you should get a better performance.

To try the new beta you need to right-click on the game name in library and then in the BETAS tab choose to opt-in for the beta version.