Donkey Kong Country 2 (GBA version):
24:43, 91%, 38/68 DK coins, 6 pages of Scrapbook filled.
It says i only have 13 feathers, but that can't be right, i probably spent some of them on that ostrich mini-game.
Obviously i had to collect all kremkoins to unlock all lost world levels and then -- final final boss. So basically i went through game twice -- first time and then going for kremkoins as i watch
100% let's play. I was also watching GameCenter CX episode on the game but that is not meant to be a comprehensive walkthrough.
But both videos taught me moves i had no idea you could do until i have "beaten" the game: where one monkey climbs another's back and you can throw it, and then i had another revelation when i saw that you can also throw a partner up. You will need to use both these moves to find all bonus tokens and unlock real ending.
I also had no idea about exclamation mark after level's name after you collect all bonus tokens.
In Lost World, Fiery Furnace and Klobber Karnage were the hardest. Both had gimmicks with barrels where you had to be nearly perfect with timing. Lost world's secret boss was kinda disappointing, it was basically the same as "final" boss only with harder patterns and just one phase.
From "let's play" i discovered that there is yet another level that unlocks if i will collect all DK coins, but at this point i can't be bothered and calling this an end (i suspect GBA version has even more unlockable stuff to reward you for collecting additional collectables that weren't in SNES version).
Overall: hard game with some cool bosses. Lots of bullshit with collectables -- usually secret passages through the walls are marked by trail of bananas, but in many cases there is nothing. You just have to know it. Or look it up as i did.
Same goes for level design. There is a LOT of stuff especially in later levels that you just have to know and remember.
Game also has some weird controls for a platformer. When i press B to prepare to run, monkey does a roll and slightly moves forward. This messed me up on a narrow platforms countless times. Busy graphical design that makes it hard to distunguish where is what doesn't help.
But the biggest techical problem is wonky hitboxes, especially with animal buddies. Sometimes you get hit, sometimes you don't. In flying levels your hitbox doubles making them even harder.