Thought the 3D models were very well done and I like how they were textured. The city outside the window looked a bit chaotic but the city was not the focus so I'm not going to judge you for this. Plus, from what I know, 3d games have far more difficulty than 2d. I would've liked a little bit more feedback when you select a new colour. Maybe a sound effect or something. Just to confirm that you swapped to a new colour. Had a fun time scribbling! I could see this game having levels where you have to draw certain shapes or something to pass. For the theme, it took me a while to understand why the world was shaking and my vision was blurring. Also, I'm not sure if there was a goal or if it was just meant to be a scribbling game.
I did like the main menu where you had to swipe through the game modes. I would've put the start button more in the middle however.
Great job!