So, I started sculpting it and at the end realized, that I was doing it all with mouse xD

Actually, I did’t do this the way Kent does on stream. Cube was formed with a few clicks of “Flatten” brush, cone was made with grab (sharp curve) flatten and scrape. Sphere with smooth and inflate. And symmetry and lock options helps a lot.
And here is my Melvin Sculpt
Preparing to make a extra credit work. 🙂