I know it greatly reduces file size and improves resource management, but sometimes I wonder if mirroring sprites is really worth it.

It was Spring Cleaning Day (traditionally reserved for cleaning the home, but we're programmers here!) and I decided to tackle my draw_clipped() script which handles sprite clipping (to simulate the feature in the NES). It was always giving me a headache by drawing garbage on the screen at certain positions. The main issue came with drawing the enemies' torsos with proper clipping. I had to work on that because I was having issues with the Winged Demon's sprite. So I finally got that fixed and working perfectly as intended -- even gained some insight on how to satisfy some of GMvania's quirky requirements.

Then I set the Winged Demon's image_xscale to -1.

Back to the drawing board...