It's exactly as you write in the description – it could be good, but so far it's somewhat confusing. What I understand from the couple of minutes I played this, you use arcane words (or just their combination, perhaps) to order minions to gather (and combine?) stuff and carry it to the gods altars to make vines grow on them to cause a flash of light which does… I don't know.
Basically the only thing I learned to do on purpose and not by accident is to make minions drop their apples.
That was my trail of thought when playing the game.
Hunger for exploration works much better if you have a set of basic, clear rules which can then be used to create more complicated things. You should be able to see an immediate effect of things you do, not randomly mash buttons in hope it'll do something.
For example, you could have abilities like this:
(Let's start on blank grass with just altars, minions, bees and environment)
– "Green" rune:
Grow a flower underneath yourself. If a bee sees it, it flies to it, pollinates it and turns it to an apple (or whatever). If a minion sees an apple, he picks it up and starts roaming around.
Or if you already stand on a flower, it could grow into a tree (→ wood logs).
– "Red" rune:
Plants a totem underneath yourself. All minions in its vicinity will go to it (totem would then disappear and they'd continue roaming). Like that, you could lead "apple-carrying minions" to "apple altar" with a series of totems. Something happens (e.g. icon appears Apples: 1 – and you can use them later to create something).
You are bound to need rocks at some point. How to get them? Since you are an ethereal ghost, you could fly in the middle of a large rock and plant a totem there. Minions would of course go to it, but with the rock in their way, they'd mine through – gathering rocks in the process.
And more and more uses you could devise with "clever use" of four basic commands.
While writing this, I figured out how to get minions to follow you using Z+C, but you if miss the info sign, you have a hard time figuring it out by mashing buttons, because there's not much of a difference between "minions aimlessly wandering" and "minions aimlessly wandering towards you" except for their thinking bubbles which do provide some help at least. And that's likely to be a key command.
In the way I suggested above, you wouldn't need to wonder "what the hell does this do?" that much because a flower/totem/… would always appear (using one button, not two), you would just need to think how to use them – in a basic way which would be clear and easy to find out, or in more complicated way which would need some thinking and "exploration".
Just a suggestion. :)
I know you want the ghost to be "powerless to affect the material realm", but in the end, that is likely the frustrating part which also summarises my feelings about this game. Good luck if you decide to build up on this idea.