How did you manage all this unique art? I attempted a "larger scaled" game like this with my Alex Kidd Pico 8 de-make, and even trying to come up with a level storage format that re-used level sequences to "compress" the level, I still hit every graphical, code, storage and even sound limit there is to hit (I had to reduce the music to use arpeggio chords to save "tracks" for other songs and sounds). Just looking at the gifs and screenshots on your page here, I really wonder what techniques you used...