Really nice game. I particularly like the tactile elements of it, especially the, for the most part, lack of UI elements, as well as the lack of the mouse cursor and the use of the human hand instead. I'm sure this would make for a great VR game too.
I liked finding the different planets outlined in the old notebook. I tried to draw some of the constellations present in the notebook as well, but I'm sure I drew them in the wrong place. I'm not sure I can figure out the secret, to be honest... but I enjoyed exploring the parts of the game that I could find.
I liked that there were a couple different mechanics in the game--the drawing, the notebook, and the telescope--but not an overabundance of interactive elements. I think the game strikes a nice balance between variety and focus.