Thanks a lot for trying the game out! The plantes looking like they are floating is caused by the pixel graphics. The hitboxes of the planets are not aligned perfectly with the pixel graphics, because if we do that, they merge into one another.
Hope it explains! ^-^
I see, thanks. There is actually one more thing I wanted to mention: it would be nice to have the ability to move left and right with the mouse. Also, regarding the red line—the one that ends the game if you cross it—I have a question: when we are holding a planet before launching it, the planet overlaps with that red line; it really ought to appear behind it. I hope I explained that clearly; my English isn't great, and since I used Google Translate, I might not have made myself understood.