Heya! So there are 2 things here:
- there is currently a small bug that "hides" the link types between icons when you drag-and-drop them in place (e.g. here the "sound on" icon at the end is linked to its left and right neighbours by "category" and "category"/"opposite"/"prefix" on the right) - I'm going to fix this very soon! :)
- the link types shown between icons use "OR", meaning that here for example, between "note, solo" and "note, mute", you could consume a link of type "category", "opposite" or "prefix".
Typically in that example, if the link types were visible on the right after fixing the bug, you'd get a valid chain that does:
pickaxe >(prefix)> piano >(cause/effect)> note, solo >(opposite)> note, mute >(category)> sound on >(opposite)> sound off
that does match the given amounts at the top. Hope it clears things out, and thank you so much for trying the game! :)