Thanks for the kind words!
I have managed to stomp out a lot of the bugs with synthesis since the jam ended, sad I couldn't manage it before😔
Do you happen to remember what kind of synthesized creatures you made?
The moving to the left thing happens whenever there's a worm part on the right-most slot, the intended "solution" for the first room is either a worm left arm or worm legs (those move to the right)
I might have to encourage players to experiment more or possibly make a preview of the effects in the menu!
Ah yes, that would make sense. I can't recall exactly which I made, but I definitely used mostly worm parts. I assumed that it going exclusively in the one direction was a glitch. I think the missing link for my understanding was knowing that I needed to make a creature with a unique combination of parts to accomplish the task at hand, but didn't know what that was supposed to look like for one part (such as worm head, arm, etc) let alone how those parts would work together in a specific combination.
Sounds like you're on the right track though! Maybe even doing something like unlocking the ability to synthesize more parts comes later, and the player is forced to only synthesis the legs and main body to get the basics down first.