I feel like you could make much better use of the available space. Everything is tiny and some of the text is hard to read because of the size, and yet you have all that unused space.
The gold/brass colour doesn't read very well against the grey background, especially for the smaller icons, more contrast between them would really help. Perhaps the grey could be made darker?
The UI feels disorganized. You have four distinct sections (resource list at the top, the circles on the left, the blueprint area in the middle, and the hangar on the right), and there's no clear indication of which is the most important at the moment, what's related to what, and so on. The resource list is the only one that has a clear purpose and a clear place in the otherwise non-existent hierarchy - it's unobtrusive and clearly there to be looked at when you specifically want that information. The other three sections all fight for attention, especially the blueprint area and the hangar.
The lack of alignment between elements also fuel the visual chaos. Everything's anchored to different points, so it appears as though every element is floating independently.
The hangar is a good example of alignment creating visual groupings - the three ship info cards are aligned and have the same size, so despite the spacing between them, they clearly read as related. The L2 and R2 button prompts are aligned with the edges of the cards, so they also feel related, but because they're smaller and simpler, they also feel less important than the ships and don't clash with them. Size/contrast issues aside, the hangar's good! You should try to apply the same principles to the UI as a whole.
Try to avoid having different icons for things with similar functions. The hangar has tiny white arrows for flipping between pages, but the blueprint has large brass arrows, even though those arrows perform roughly the same function (presumably, they flip between different blueprints). Even though the purpose is clear in both cases, it feels less unified and more chaotic. It could also cause confusion if e.g. the player makes the guess that one type of arrow represents inactive/unavailable pagination.
Similarly, some of the ship circles have highlights, and some don't, which can be misinterpreted as meaningful.
In the circle bar on the left, you have a large green sphere next to one of the big circles. Is that the currently highlighted ship, or...? The green sphere looks a lot like the resource icons. It also doesn't feel thematically connected to the ship-circles, perhaps show selections by changing the circles, e.g. by giving them a brighter frame or a different background colour within the circle?
