The field is filled with various mechanisms that block the player’s path forward. By using the Lunagear to interact with these mechanisms, you will be able to proceed ahead.
Combining two Orb elements on your Lunagear will manifest special effects. For example, combining and activating (by pressing L2 and R2 simultaneously) fire and earth Orbs will build a turret that automatically fires at enemies.
And finally, here is a short look at the Grimoire weapon in action.
Arc of Alchemist is due out for PlayStation 4 on February 7, 2019 in Japan, and summer 2019 in North America and Europe.