Quick announcement - we're unsure what's happening, the free week license expired for users who've played the free week. The Steam Store UI still says there is time left to play for free.
This is incorrect, it is no longer possible to play for free it seems, and unfortunately we cannot change this on our end. We've reached out to Valve, but since it is weekend we probably won't be able to reach them.
If you still want to play - we'll leave the free week bundle available with the 35% discount, so you'll still have time to pick it up at a high discount.
-Stitch Heads