Hello, nice to see you here.
Here is the plot, let's say you are a alchimist which masterize the power of combining elements.
Such a power draws attention, an army of spartans are walking toward you.
Fortunately alchemy will help you to push them back, use your power to build tower to destroy them.
So in short, it's a tower defence. Drag elements from the right panel to the map to build a tower which will automatically shoots at enemy.
You can upgrade a tower by dragging some more elements on it ( or at least this was planned, it's currently very restricted)
Try to rotate the map by dragging it, it's pretty cool
That's pretty much all, as you can see the game lacks of some core features, enjoy as much as you can