Thank you for playing and for your comment!
At one point I thought about adding a level selector, but since there are only 10 levels, I didn’t really see it as necessary. If I ever decide to expand the game and take it more seriously in the future, I would definitely add that feature.
I’m glad you noticed the connection between levels: you always start where you finished the previous one. I did that on purpose to give that connected feeling you mentioned.
Regarding the controls, for now I prefer to keep them as they are. The main idea is to be able to play using only the arrow keys or WASD. I’ll only add the option to invert gravity with SHIFT and SPACE because of habits from other games. However, I really liked your idea about inverting the movement keys when gravity changes, I’ll keep that in mind!
Thanks again for such detailed feedback!