I had the same problem since I thought Newton's first name was "Issac" while I was making this 😂. Luckily I looked it up just in case and realized it was "Isaac."
For the tetris piece, I agree that it is strange to have only wall that has a down button. I had a separate floor for all the other walls too but then I realized I didn't really need them. But for the window wall I never drew the floor in the first view where you can see the window, so I had to put it there. I'll update this later and change that, thanks for telling me!
Still, I'm glad you had fun playing the game!