The world's most important 20-byte patch

• Implemented firing while aim direction is pressed (thanks, tito76!) 
  
• Switched from Win64 to Win32 (0 bytes different?  That doesn't sound right.   Somebody please test this thing on x86 / 32bit Windows. )
• Fixed a critical bug with the way boss parts exploded, and also corrected a long-running, subtler bug in the way non-boss explosions are shaped.
  

There was a huge bug in this release!  Huge apologies to anyone who downloaded an empty project.

The corrected release is here.