We tested on a variety of different machines, but given our limited resources (we're a 2 person team) we couldn't test everywhere. If you run into bugs or performance issues, post them here or email me at firstname.lastname@example.org and we'll do our best to fix them!
Let us know if you encounter any bugs or performance issues Sticky
Got reports of some players having issues with alt-tabbing out of the game while using a second monitor, as well as a bug with the master volume controller. We've made a small update that should fix those bugs, so make sure to grab the latest version. Let us know if you guys find anything else.