I have now enabled Steam Cloud syncing for your saved progress / high scores. The only problem is I cant currently set it up to save cross platform due to the save files appearing in different spots on Mac/Windows/Linux. BUT if you have 2 macs, or 2 windows machines, it should keep your saved game / progress / achievements synced between the 2 computers.
If you're having any trouble, or it doesn't seem to be working, please don't hesitate to drop a comment here or get in touch with me at [email protected]
Hugs, pals!
Nate