Post-jam update

Thanks for playing, and for all the excellent feedback!

I've just uploaded a post-jam update, which incorporates the following changes:

• Significantly increased the difficulty and the steepness of the difficulty curve.
• Gameplay is now divided into "levels", where every 5 points timer speed and building complexity steps up in a noticeable way.
• Track and display your high score.
• Added column numbers to the blueprint and building.
  
• Fixed a rare bug where blocks wouldn't drop properly.