Mostly centered around the HUD, popup, overlay, boss, and player shot
functions we're about to reference in the upcoming decompilations.
Part of P0186, funded by [Anonymous] and Blue Bolt.
Palette hacks not included yet. Yup, that's how all phases can use
hardware color #0 as their background color.
Completes P0147, funded by -Tom- and Ember2528.
That could have easily been architected without forcing every boss to
manually set the "background to be drawn while bombing" function
pointer.
And without the laziness of just redrawing all tiles during the blocky
opening animation of certain bombs…
Part of P0147, funded by -Tom- and Ember2528.