I like scramblestar more, SpaceBreach sounds to me like if you looked for a variant to the name EarthBound, or at least a similar name. Something like Undertale looked for similar words to Cave Story.
Scramblestar seems more original, and it fits the style well, and the logo is really nice.
And also now I'm wondering, how did you make the clay model? Is it from actual clay or is it a 3d render? It's really nice, and if it's a render, how did you do it? It would make a nice devlog post.
Finally now that I look at it, the sprites in the 17th picture are much nicer than the ones at the 7th, but that's just my opinion.