waltz 3 is absolutely insane and i have no idea how anyone thought it's even remotely reasonable.
i somehow managed to find a configuration that let me barely make it in time, but my fingers were moving faster than i could even register the pattern with my brain.
the only way to physically make that time is through muscle memory. it's that insane.
(for actual tips, i solved it by having the left two keys binded to Z and S. the idea is that you press them both as if it was a single button, with Z taking priority on the single press because it's closer. bind the right 2 to any other two keys, then you alternate between the two).
double tap is also BS for a different reason.
to register two individual key presses, you need to able to release the key before the target time. it's not about how fast you can press it twice, it's that you can't press it any faster than that. it's honestly sheer luck.
i didn't even realize i somehow managed to clear it and ended up doing another bunch of retries. after i gave up and took a break, i came back to the next level already unlocked.
the last pattern was pretty cool, because it's multiple different patterns, and they don't oeverstay their welcome by repeating a million times. wish the whole game was more of that and less waltz 3