How many missiles does it take to kill the final boss in SpaceChem

The demo ends when you complete World 3 (as World 4 won't unlock). You have more than a hour left of gameplay; those levels aren't easy.

It is the same game more or less, but missing the "boss levels" (Defense). But for the price, who can complain? :) It has ResearchNet so you can work w/new content on the go...

From the Zachtronics site:

SpaceChem Mobile is a direct port of SpaceChem, meaning it’s almost exactly the same, but with a few notable differences:

• The controls have been reimagined for touch (an obvious change), including a new way to quickly place arrow instructions (hold a button, drag a path).

• The toolbar has been moved to the top to make it easier to place instructions.

• The main campaign does not include boss battles or the story and is easier to progress through (more optional pipelines, specifically).

• Video recording and forum signature generation are not available.

• It only costs $5.99!

ResearchNet is fully functional in SpaceChem Mobile and will receive new issues of the Journal of Reaction Engineering at the same time as the PC version of SpaceChem.