Today we've got an update with a couple of general enhancements:
- Added VSync which will cap the framerate to the refresh rate, thus reducing CPU load on fast machines as well as improving visual quality.
- Added Steam achievement progress tracking for "Kill X enemies" achievements.
- All audio is now suspended/resumed as the game window is minimised or goes out of focus.
As always, let us know in the comments or forums if you run into any problems, and enjoy!