UPDATE 01: What's the pitch?
A 2D side-scroller where players survive and battle with a Magitek mobile fort (think Howl's Moving Castle) in a post-apocalyptic setting, where sentient magitek are waging wars against their human owners (and have been winning thus far).
Similar to Kingdom: Classic layout and visuals style, players control a pixel art avatar traversing along a side-scrolling platform (likely 1 way exploration, instead of Kingdom's 2 way exploration).
Players don't have attack moves, their main goals are to scavenge for debris (e.g. from enemies' remains) to feed the magitek forge spirits (just like Calcifer in Howl's) to generate ammo for the various weapons installed in the mobile fortress.
Some examples of weapons: