Updates

• added stylus support
  
• added About Menu
  
• removed splash screen and upgraded engine version
  
• perf updates (anchor point shader)
  
• various UI updates
  

Known Issues

• macOS sometimes crashes on launch (close and relaunch again if this happens)
  
• macOS sometimes shows a "Quit Unexpectedly" notification, even when the game is quit expectedly (dismiss the notification)