They're a bit confusing to look at out of context, but we can at least tell that one is a spaceship selection menu, and one shows more of the Tetris-like upgrading. Parts take up varying amounts of a 3-by-3 square, and there seem to be many of each type of part to choose from (the screenshot shows Type-A through Type-K of some part). The last screenshot, as far as we can tell, shows a ship flying toward some kind of portal structure, maybe. Some kind of pretty, futury space stuff.
Gallery: Infinite Line
[Via GAME Watch]