Congrats on releasing another game GrahfMetal! I had a blast with Infested and so far it's been the same with Spectacle. These games always hook me after playing the NES version of Shadowgate.
One very minor issue I noticed: Examining the writing at the Hesperides Path gives a spelling error of "decifer".
Also, my apologies but I appear to have been stumped and could use a hint. I have the red, blue, and gold keys and believe I've done everything in the Northlands. I've reached the palace gate in the Southlands but don't have the correct key. There's a boulder I can't move and the shah statue accepts one item, but there's no reaction. The loose dirt in the area tells me I need a shovel but I don't seem to have seen one in any of the places I've been.
I did initially run into a roadblock with finding the blue key from not noticing the spot to place the item so I'm likely just being unobservant or not understanding Scroll II. I have gone back through each screen to see if there was an item or writing for a new spell with no luck. Much appreciated for any help!
And best of luck with whatever project you work on next!