This is the reason I love Pico-8, and have never really been into other "fantasy consoles". Pico-8 embraces the spirit of the old 8-bit systems (not just the aesthetic) where there are "hardware" secrets that you can discover and abuse. The limitations mimic that of old systems: there are several ways to access memory, multiple ways to do the same things - with tradeoffs to each. If you want to do something crazy, you have to really know the machine and think outside the box.
It's all artificial constraints (though you can easily make good games with resorting to tricks) - but these kinds of old-school easter-eggs make Pico-8 just, joyful!
On the old consoles, say the SNES you had up to 16 palettes each with 16 colors to use for sprites or backgrounds - although for sprites one color would be transparent.
It's all artificial constraints (though you can easily make good games with resorting to tricks) - but these kinds of old-school easter-eggs make Pico-8 just, joyful!