Thanks for the detailed feedback! I've never played Opus Magnum, but all of the Zacktronics games look cool. I played SpaceChem but haven't gone back to that genre after an extended Factorio phase :)
You're totally right that everything is essentially in 2D, despite being in a 3D space. I've been learning how to use Unity in 3D recently, so I think I forced it a little. My early impressions are that making reasonable graphics, especially without an artistic background, is much easier in 3D because of built in lighting systems/shading.
Making it a mobile game seems reasonable! There are lots of bite sized nuggets that are easy to pause between here. I don't play many mobile games myself, so it's not a genre I think about often or have a lot of experience with.
And of course, thank you for playing!!