Maybe my laptop key bindings, but I was unable to get any number keys to work. I only got '!' characters.
Otherwise, smooth and easy to work with.
No Both Your Laptop and Bidings Are Fine, I Didn't have the time for numbers, My orginal plan was to have you write numbers with number keys above letter keys(Which isn't implemented and you see '!' character) and numpad to scale the grid and change the shape of the grid (Which is working but most laptops are 75% and don't have numpad keys on right side of the keyboard)