I want a paint tool which has various brushes, a pixel tool which lets you draw pixels, and more.
Hello! Glyphr Studio is a typeface design tool. There are no pixels in fonts - everything is stored in "Em Units". Pixel or boxy typefaces can be achieved by drawing a square and copy / pasting it until you get a letter form that you like.
The way OTF is encoded, it can only have closed paths filled with black. That's it! Brushes strokes would be impossible to save to a font file.