Love the game, bought this on steam and I have a few suggestions, using links since I seem to be unable to link images directly
1. I think the bottom left icon should bring you to the loadouts tab. I almost never click it and it's one of the most accessable buttons, kind of frustrating. Conversly, loadouts is super convenient, but hard to find. I'm not a fan of using the keyboard when playing an idle game, even if it's a great, active one like orb of creation so even though if i were hardcore i could easily access it with z, that doesn't help my lazy ass out.
2. The naming is super confusing
https://i.imgur.com/rZkMzPY.png
I never know what i'm getting because all of these panels sound like they do the same thing. Casting you can delete and it would be better, It's much easier to just use the icons in the bottom Left and it would reduce the real estate of the game and let you find things easier. "Loadout" is fine, "Skillbar" might be better. You could delete the "learn" section of spellbook and just auto give players the abilities, doesn't seem to serve any purpose other than the player clicking arbitrary buttons, or maybe make it a sub page at the bottom of "manage" this would greatly simplify the excess buttons of the magic section of teh game. So "spellbook" could be renamed "Manage" using the sub button within spellbook instead as it's much more identifiable. "Wizardry" is fine and is the one panel name that doesn't often make be click the wrong panel.
3. I would love if right clicking a spell brought up a list of spells vertically that would allow you to replace a spell if it's not on cooldown.
https://i.imgur.com/mBLFWTq.png
(Imagine if that wood spell were all the other different spells you owned, glyphs could be set per spell in the loadout panel so whatever you have them set there, would affect this assignment)
4. Also if the spells were larger and had a slightly larger area in the UI it would be much easier to use them and justify getting rid of the "casting" Panel as now you would just have one nice area to cast spells with decently sized icons.
https://i.imgur.com/pwtADBq.png
I feel as if this is the most important UI element and it's also the smallest. If they were stacked on top of each other and made larger it would be nice, you could save some room by allowing the user to collapse the orb/ make it smaller for the resources to display more.
Just some random feedback! I know some of these might be impossible to add for whatever reason, or they may be niche ideas or whatever, take 'em or leave 'em.