This is quite fun - I like the low-res aesthetic, and exploration is enjoyable. I like how even traveling between planets is done on the grid, rather than being an 'overworld' UI. The combat is adequate, although the fact that your view angle doesn't automatically reset is slightly awkward. I did run into one small bug where the rune receptacle kept re-opening its UI every time I interacted with anything in the area, but it wasn't particularly impactful.
I never did find that other weapon part.
Here's a recording of my playthrough: