4x4-based, with (deceptive) 3x5 look (four 4x4 glyphs ruin the saving made on sixty 3x5 ones, if it were a concern [just because you assumed, IMO, that you could always store the glyphs with a variable width, which is not always the case, e.g. not at all in real life]).

Good sets of characters (without duplication in Latin), but the whole is missing almost all the punctuations/symbols (which is within your reach of improvement, I bet, since ".," is a tad short).

Thank you for providing your viewpoint on several difficulties at this scale. I cannot unveil too much my own choices at comparable sizes, but your selections are sometimes very good. We shall see whether they withstand the presence of the missing characters, 7-bit Ascii-wise.

So, I like it, but I'd love it if it were basic Ascii, at least (an actual/usable font for everyday's needs, that is, not only titles or short texts without syntax).

Your Cyrillic set duplicates a few Latin glyphs (or vice versa, which might be an issue by nature, I don't know a lot there, that's why I stick with Latin in my mature project for the rest of the western world).

And your few links were very welcomes, thank you for providing them, they helped! (E.g.: they remind my missing comments; a new download site to my very long list; even a tricky -yet very incomplete and payable- 'max-6-dot' font.)

In this field of minimalism (should I say: 'poverty'?), Russia and its former countries are very skilled, I saw (I have a few examples with the Speccy, for the comparison in pixel art). Japan too, but IMO their pixel type designers are not trained enough with our Latin characters (the ones in Ascii, I mean): e.g. they mix the cases too often, and degrade like we woudn't do (the same if I were to shrink their foreign -or less mastered- characters).

I have to stop. More comment on request (or PM if I 'leave').

Bye!