Infiniupdate #3 has been released! Read more about it here:

http://www.zachtronics.com/infiniupdate-3

New Content

• Added a new mini-campaign, Atropos Station, which includes six new puzzles about building things from inputs that require processing (i.e. evisceration).
• Added a new mini-campaign, The Homeward Fleet, which includes six new puzzles about building massive products.
• Added a new block type, the counter, which is a sensor that remembers how many blocks it has detected and triggers on a particular count.
• Added a new block type, the painter, which sprays paint on the sides of other blocks as they pass by.

New Features

• Added an "advanced" level editor, which allows you to build puzzles using the same tools that we use!
• Added a new metric, block count, which tracks the number of blocks in your factory other than platforms.
• Added Steam trading cards.
• Added more Steam achievements.
• Added tips to the loading screen.

Bug Fixes

• Blocks unlocked in the second campaign can now be used in every level of the second campaign.
• You can now point at blocks you didn't build when using the area select tool.
• Fixed a bug where extruded metal would flash red when eviscerated.
• Added lots of performance improvements to rendering, saving, and the simulation.