Noticed exactly the same - there's no description of the library whatsoever on the landing page. It is implied that it is a DataFrame library, whatever that means.
Maybe this is sort of like the opposite of how scam emails are purposefully scammy, so that only people who can't recognize scams will fall for them. Only people who know what "a DataFrame library" is - which is an enormous number of people, since this is probably the most broadly known concept in data science / engineering - will keep reading this, and they are the target audience.
It is described in a succinct way. "DataFrames" is that description. It's the very first text on the page. It's really the same as having the word "database" be the first text on the landing page of a new database project. If you don't know what the word "database" means, the landing page for a new database project is really not the place to expect to learn about that. The "data frame" concept is not quite as old or broad as the concept of "databases", but it's really not that far off. It's decades old, and is about as close to a universal concept for data work as it's possible to get.
I think you could do this simpler in screen-space. I don't think the effect communicates the interpolation of the actual camera parameters very well. Then there's the question: does it add or reduce from the gameplay? I think the latter in this case - a clearer way could be simply finding a screen-space line and using that as the split in 2D.
Very cool to see such a list maintained. The PaybackTime 2 is still playable, albeit without sampled sounds (crashes the emulator), here: http://rflxn.com/paybacktime2/
