Welcome back Starknights!

This update focused heavily on bugfixing, polishing, and various improvements. While this update didn't add anything in the way of content, it certainly leaves the game in a much better state than before.  Lots of new effects and graphical improvements make the game look and feel more immersive. The absolute slew of bug fixes and performance optimizations also make the game much less frustrating to play.  Hopefully there will only be 1 or 2 more updates before the demo release! 

Added: 
 - New shielder effect 
 - New credit effect 
 - Slowdown effect when hit 
 - Health bar 
 - text when credit collected  
Issues Fixed: 
 - Knight now unlocks correctly 
 - AOE no longer stuck on screen if attachment sold
 - No longer have the choice for a challenge level after tutorial 
   or boss 
 - Unlock text resets 
 - Fixed boss turret placement glitch on resize 
 - Improved how particleSystem is handled 
 - Fixed a few other resize issues 
 - Enemies now explode at level end 
 - Dying during a challenge no longer offers an item 
 - Dying during a challenge no longer starts you with that challenge 
   next run 
 - Starting new game gets rid of attachment options from last run 
 - Fixed crash when healing aura is sold before use 
 - Fixed hub tutorial text scaling glitch 
 - Greatly improved hitboxes 
 - Explosions now don't show when an exploding bullet passes screen 
   width 
 - Massive improvements to memory management
 - Improved performance when using seekers
 - Lots of other bugfixes  
Changes: 
 - Damage numbers tweaked 
 - kill x enemies scale with level 
 - Shop cards now increase slightly when moused over 
 - Improved explosions 
 - Slight graphical improvements to the shop 
 - First shop on your first run has guaranteed: cannon, repair droid, 
   void bomber 
 - Improved level start transition screen 
 - Tutorial overhaul 
 - Slight changes to pause menu
 - Boss name now displayer