DSP is a game about putting things into boxes so you can build things to put in boxes so you can build boxes so big you can put stars into the boxes. Boxes, by the way.

Beautiful simplicity, intrinsic logic, elegance on a level I've never seen in a video game before. Also the graphics are nice. There is nothing quite like standing at the north pole of your zen garden planet staring at your ten layer deep matryoshka sphere that you designed to look like you've created an origami swan with tesseracts folded through a variable-dimensional n>5 space and thinking to yourself about what the next one will require.

Do not stop at mission completed. That's only the end of the tutorial.