It's call 2.5D some game use this too, like Cult of the lamp and don't stave.(Yes , It's a 2D asset seting on the 3D Project) Our team didn't have a 3D artist and refuse to use free asset bcuz we want to make it with our own hand and have plan to Update game soon. Our another game it's 2.5D too but didn't port it yet.
Thank you so much for try our game! Really happy too know that u love it!