Yeah, maybe we've made the demo a little too complicated and mind-bending...
At the bottom left of the inventory, you'll find some prominent buttons to open encyclopedy and the help section - maybe that'll help you understand the game better
After looking at the help section and writing some notes with every attempt i figured out the combination needed to get new body parts. without the notes i dont think i would've figured them out xD Finished the demo, I'll probably revisit the game in a few months, i'm curious what it could become