A new update has been pushed that adds a few minor features and fixes a bunch of bugs. Most notably, it fixes an issue a recent update introduced that caused fresh installations to not support audio on Windows. If you encountered this problem, please try again with the latest update!
We've also received reports of low framerates. We're currently still investigating what could cause this. A possible workaround for now is to try either playing in windowed mode, or toggling fullscreen off and on again.