The obsessive-compulsive perfectionist in me is slightly irked that after completing the game, there is no way to go back to the tutorial (for the achievement) or the shop (to finish the upgrades). Maybe this can be fixed in a future version?
After hitting a save point that killed me immediately afterward (on one of the spinning spike blocks), I was glitched into flying forward until the end of the game, but of course was not credited with completion. Upon restarting the game, I was killed immediately and sent back to the START OF THE GAME. I suggest removing that particular savepoint.
The stars represent the creative minds of children, free to wander in beautiful, artistic patterns until swallowed up by the demands of society (as represented by a circle of magnetism). They are consumed entirely by the illusion of a stable society, forced to conform, and lose all individuality.