Is this better?
Or how about just "8-bit music".
I'm surprised a community as pedantic as this one doesn't get it.
8-bit audio sampling is a specific level of digital audio fidelity.
Human language is context sensitive. Pedantic doesn't mean we have to be stupid.
The most annoying thing about April Fool's Day is everything that should be real but isn't, and everything that is real but shouldn't.
The solution is to memorize the 4-bit sequence of each of the 16 digits, type the left nibble with your left hand and the right nibble with the right on the number row.
It takes a few minutes of practice
My suggestion is to have the enemy z-index start at a high number and decrement per enemy (eg, z-index = 1000 - enemy_number). Trivial fix, and that way more pertinent enemies are on top with their numbers visible.
Tried the game, it's nice. Got 1 point on my first try, somehow managed 15 points on the second. I don't think a baby would get any points, so I'll go with April Fools.
 My son could play Dragonbox when he was 3, so I am not knocking the game, but I am skeptical it will be of much use when he does algebra in school.
When shown to her using fractions of a drawn circle or simple multiplication of real objects, she seemed to understand the concept in the abstract.
However, once I introduced something like ayx/yx = a, it seemed to trip her up, even though the motions in Dragonbox made sense to her.
That said, I'm not sure I understood why x/x = 1 until much after 5 years old, so maybe there's something to be said about going through the motions of computation before truly understanding the general concept.
The thing is, this isn't that difficult of a task. The disadvantage adults have in a task like this is, I believe without scientific evidence, the learned helplessness that so many adults have, probably induced from years of "education". A three year old flips through an iPad interface because nobody even thought to tell them it was hard; an adult that can't pick that up probably can't pick it up because they believe they can't pick it up.
In this case, there's 16 whole patterns to learn, and the patterns themselves are highly patterned so it's even easier than that. It's well within what a very young child can do. It's far easier than walking or speaking in sentences, those tasks that many two years olds already do better than our best AIs. (Yes, 2/3 year olds have characteristic grammar failures typical to the age... but then again, our best general-purpose AIs still botch things up too...)
Whether it's a faked video or not, I don't know or care... I see no reason to believe that a certain set of 2 years olds could do this, that a much larger set of 3 year olds could do this, and the vast majority of 4 year olds could do this, as long as they can concentrate for long enough. Indeed I would expect them to find this a boring task relatively quickly, because it's not that challenging.
I mean chinese parents who teach their kids to learn many languages, maths etc. at age 1 and up may be cruel, but if they actually don't force the kids, but let them have fun and let them do those tasks voluntarily, then I fully support the early education method.
How many time / tries did she need to understand the game?
Did you give her any clues about how to play? Can she read some letters?
(Semi off topic: I don't know how far developed your offspring is, but my four days shy of two years old is only able to count up to three and recognize her own name when written down sufficiently large ;)
Edit: she's also able to mash key's like a perl programmer)
The hex numbers are two digits, and you can treat them both separately, so use the first 4 bits for the first hex digit and the second 4 bits for the second.
If you were brute forcing, this reduces the search space from 256 options to 32.
A good reminder of how you can handle hex. Really nice.
1. Remember each digit is 4 bits, you can solve separately
E1 -> E 1 -> 1110 0001
2. Solve as even then just flip the last bit for odd
Of course, I'm about to try again.
(really needs a shorter URL too. too bad flippybit.com is taken.)
My next game was a much more respectable 25.
Caught some lucky numbers FE was first!