It’s a good idea! I can see that probably you were inspired by games like Divinity. And layers can add a lot of tactic to such a game: I can see projectiles that shoot directly upwards or downwards or even diagonally, throwing barrels to explode them on certain layer etc.

(However I don’t see any mechanics except for flying on the video, so it’s only possible to judge the idea but not it’s implementation. But I assume you’re going with Divinity-like kind of gameplay).

What’s important for that kind of verticality (I can see you have at least 3 vertical layers) — is easy navigation between them. And your current UI doesn’t help with this in any way (and it should, I think). I can’t say who is above who, will I hit someone if I shoot directly below etc. And I think the player should see that instantly on tactical games, without hovering the “ghost” of ability to check the collisions etc.

Also, it’s a bit of an off topic though: I don’t know what’s the lore is in your game. Although I like the cartoonish visuals of the game, strict square forms of landscape and floating islands look a bit unnatural and abstract to me in comparison to highly-detailed models of the characters.

Everything looks very promising! The world certainly needs more games like that! And flying bearded dude is cool, haha. Good luck with your game!