That one hit me in a way I didn't expect from a game in this jam. Here! Have your stars :)
Lets start with graphics and sound. Or maybe lets start with the atmosphere, because I was going to write the graphics/sound work great to build the atmosphere. It was really something else- how the moving left and right was essentially the only mechanic, but how you made actual puzzles with it. It uses simple means, but achieving complex results.
Also... you rarely find a jam game, where in the end you wonder what did the author try to tell us.
I see that almost all the other comments use the word "unique" to describe this game... and it truly is.