Though as an extremely novice guitarist, can I ask why the fretboard is "upside down" with the lower notes at the bottom, rather than physically on top as they would be when holding a guitar? (Having the strings be different thicknesses might make this more obvious too). This made trying to test with the couple of chords I know more difficult, as I had to try and flip them vertically first.
When holding a normal guitar right-handed (neck to the left) with the human head above the guitar, that's also "upside-down", so it matches the display on the screen.
Of course there are lefty guitars, and people playing right-handed guitars left handed, and as there is nothing that doesn't exist probably also someone playing a lefty guitar right-handed, ... so switches to flip in all directions would probably make sense.
Makes sense, though I'd say that my brain still has a concept of up even when looking down at a fretboard. More so when I'm holding a guitar and looking horizontally outwards (reading from a screen) - my brain knows which line/string is closest to the ceiling and which is closest to the floor. If I'm copying a chord from another player (very common) then I'm naturally doing the horizontal transposition but never a vertical one (ok, lefties playing a right handed guitar backwards, but that's rare and confusing in itself).
As the page seems to be a resource for inexperienced players, and as there's already a lot of confusion between up/down for notes and spatially on a fretboard, making things blindingly obvious seems like a bonus. Even something as simple as making the "strings" different widths would give someone more information to spatially orientate themselves.
edit: I guess my brain is far more wired up to deal with things flipped horizontally (looking in a mirror, being shown how to perform an action by someone facing me), but I can't think of anything where I have to deal with objects flipped vertically (rather than rotated 180). Interesting to find out this seems to be a "me" things rather than common/obvious one :)
Though as an extremely novice guitarist, can I ask why the fretboard is "upside down" with the lower notes at the bottom, rather than physically on top as they would be when holding a guitar? (Having the strings be different thicknesses might make this more obvious too). This made trying to test with the couple of chords I know more difficult, as I had to try and flip them vertically first.