tile updates are not really that feasible so we'll do something else. most likely.
the boss can be scrolled up/down/left/right and im going to split his existence into several palettes so that i can manipulate it better using color changes.
something along these lines, that allows me to only show the hand or the boss itself through a single palette rewrite.
the boss itself might or might not become animated, depending on how i get tilesets done for that (a full chr like this eats A LOT of rom space, and using chr ram to animate it means i will have to include 4 copies of the CHR to the rom.)
it could be done but it's too much of a resource usage for a single boss.
as far as the floor and such goes, there's 31 8x8 tiles free on the tileset, and this screen will be drawn in 8x8 tile mode, which means designing the floor etc will be much more efficient than just designing linear 16x16 blocks without reusing single tiles
like nesmaker normally does.