SPOILERS - all solutions
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I didn’t find them all but these are enough to beat the game if you’re stuck:
progress:
bread -> breadboard
burger -> cheeseburger
raw_meat -> cooked_meat
raft -> yacht
straw -> stick
stick -> brick
torch -> flashlight
oven -> microwave
sledgehammer -> jackhammer
scissors -> paper
rock -> paper
scissors -> rock
egg -> chicken
archor -> submarine
invert:
straw -> steel # Light and soft vs dense and hard
feather -> brick # Light and soft vs dense and hard, again
stick -> rubber_band # Brittle vs elastic
microwave -> fridge # Heating vs cooling
raft -> anchor # Floating vs sinking
cow -> bull # Masculine vs feminine
breadboard -> chalkboard # Physical (cooking) vs intellectual (learning), I guess?
wall -> window # Functional and opaque vs aesthetic and transparent
flashlight -> solar_panel # Emission vs absorption
combine:
bread ->
board -> breadboard
cooked_meat -> burger
burger ->
cheese -> cheeseburger
brick ->
brick -> wall
straw -> oven
stick -> sledgehammer
chalk ->
board -> chalkboard
straw ->
straw -> haybale
stick -> torch
stick ->
stick -> raft
paper ->
paper -> book
milk ->
raw_meat -> cow
raw_meat ->
raw_meat -> bull
feather -> chicken
rubber_band ->
rubber_band -> ball
wall ->
wall -> house
Arrows are progression, mutual arrows are inversion, + means “combine with self”, and any name means “combine with {name}”: