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I think this is incredible, and I am so happy for him, he deserves all the praise he gets (and maybe more). I will sin and make this about me, briefly, but just to say that when I was a kid/teenager with a really slow computer, a) I enjoyed coding much more, b) I think I was a way better programmer. Constraints make you better, you have to be smarter. I miss those times.
Well, nothing is easier then adding constraints. Removing them is what's difficult - so why don't you add them back if it makes you a better programmer and you enjoy doing it more? Personally, I think the reason you enjoyed it more as a teenager is just down to the fact you were fully in control of what to do and had no external pressure to earn money etc, so if anything you had less constraints - at least from my po…
I'd wish to get a project that's low-level, multi-year and high quality of engineering and longevity. Make the best you can – something to be proud of.