Fixed Color Palette

Unfortunately, the previous version of the app was using colors from both the standard PICO-8 palette and the hidden palette, which may have resulted in images that use more than 16 colors.  I apologize for any inconvenience this may have caused.  I've released a new version which corrects this to use just the standard palette of 16 colors.  

A future release will allow you to create a custom palette of up to 16 colors selected from both palettes.