I laughed. I cried. I screamed. I yelled. I managed to beat all the levels.
Some of the levels were really cool. Particularly the 3D ones were super interesting and that was a really cool gimmick. HATED the dark levels. Especially the figure 8. I had to take a break and listen to calming music and take deep breaths.
Good game. Incredibly polished. Good puzzle design. I need a break.