I didn't figure that out before – I cleared them on day 5... and regarding level 28, I can say that if you analyze it in detail, it's actually possible, even with my gameplay. There's a very good village at the bottom in the center – I didn't even go there... I don't even understand what I was doing in the desert; I went into the snow and so on.

Added 6 minutes later
And also, did I understand correctly – the VDV speedrun was shown in one evening??? That's amazing... someone as slow-witted as me definitely couldn't do that... will we see the full archive?