Great, but I think it could have proper diagonals instead of pixelated ones.

Or, you could disconnect the diagonals and instead use separated squares to simulate the angle. That way, you could continue the pattern of some "unconnected" squares already established in the other letters and numbers. (I am at work now, so can't provide an example if my explanation is too confusing...)

OK, just tried my own suggestion, and I couldn't make it work properly... :^(