include 0'brothers
koopas should come out of their shells like ninja turtles
add orange gel support for underwater physics
change bridge disappearing to take [A] as a hint
horizontal koopas
platform paths visible
upfire customization
single drop gel tubes
platforms that fold out from the background
fix checkpoints n stuff
redo rightclick menu
make proper vertical scrolling

NEEDS TESTING:
fix 2-4 players dying when coming out of plant

DONE LOL:
grates
make an extra jump when growing
piranha plants killing you from inside (portaling)
fix koopas killing you when cliffhanging
add entity that stops people from walking over level
bulletbills on non-solids fire once
gel tubes with input
option to pick the background color with RGB sliders
mirrored portalprojectiles should have their timers start at 0 for design reasons
koopas should flip shit when struck from below
platforms that are passable from below
purple gel
excursion funnels