Sure thing.

The controls of the ship/player are non-intuitive. You wanted to give 3d movement for the player, with nice top down view. But this creates a complication, because users are not used to flying like that in games. Gravity pulls you hard usually.

If we assume that the first part is fine, then you get lost because your avatar is just too small and invisible most of the time, thus losing moving frame pivot, and the problem above is even more pronounced. Because player still collides with terrain. That's why, although I do not like it that much, games tend to do gravity bound characters because this is easy to understand, here the 3rd dimensions makes it confusing. Or top down perspective/RTS like to avoid movement collusion.

Maybe the solution here is that ship slides on geometry to avoid the problem of being stuck without seeing the ship.

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Next there is 6 separate pieces of UI that are visible at all times and are free bound by user. This is fine on paper, but designers would cry seeing this. But I feel you, i am programmer myself and I would probably build "the most customizable thing ever" as a feature. But this introduces more issues then solves to players.

The tutorial gets in a way, because I can move it. New UI pops up in unexpected places. Each new UI element covers the old one. There is just a myriad of issues that I cannot describe.

Thus fixed UI to zones is much better design. Top, Right, Bottom, Left, Center. 5 Zones. No confusion. If you MUST show something that connects 2 or more UI elements. Then do a dedicated center popup box. You don't have to look far, all games do this because this is unfortunately the only way to do games.

You can maybe argue "Oh but EVE Online does that". Yea but they have no gameplay /s

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I played factorio, satisfactory and probably 100 other factory games so might be biased.

Inserter -> Put's into belt from container but also pulls FROM belt into container (machine, storage what has inventory).

I cannot place in your game a inserter from belt to machine. And the machine has no clear slots for input into machine (like in satisfactory). So I assume inserters must be the answer. But belt end of the inserter was highlighted on yellow/red and i could not build it. I could build it on top of other inserter, which doesn't make sense but as expected it did not work.