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I was doing digital art / animation and programming machine code (not assembly) on the C64. I spent so many weekends and nights on that thing... when I should have been doing school studies. I guess it worked out, because even when I finished school, none of the educational institutions had started teaching what I had already learnt.

I was so nerdy with programming, that my sisters could whip me at most games we had.

Here is my game PhotonTrace (inspirad by the Tron movie) - I tested it today with my daughter on the 8-bit Atari emulator!

A-ha! I thought there was something Tron inspired with this. Did you ever release it?

Assembler is machine code, only you use short mnemonics (symbolic machine code) for the processor commands instead of hex numbers.
Here is part of one of my Assembler codes for a game. I didn't have a printer so I had to write it down all by hand. On the screen I only got 40 x 30 characters which was too little to see the big picture for debugging. I actually started to write the code on paper before I typed it in.
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This is amazing!