Hi @Eko Welcome to the forum. You might want to attach a pdf sample of your work so people can zoom in and out to see the details.
If I recall correctly, this is a real names forum unless your nickname identifies unambiguously who you are (as in: foundry name).
As to the design itself, I like the general idea of /g. The terminals on the /S bring to mind Armenian type, or maybe its rendition in Noto. The corresponding terminal on /G needs refinement. The top bar on /E should be shorter than the bottom bar, in most cases.
The Q brought my attention at first sight, but being a letter lover more than a letter specialist I rather liked it. Is the bottom groin a little heavy? It crossed my mind that the top looked like it was missing some overshoot in context of P and R.
Bringing the crossbar on the 4 a tiny little down instead of protruding the stem might help while preserving the spirit.
I think that original 's' was a good start, only it looked too much contructed. The upstroke could be more slanted. Imagine how it looks in upright fonts — it usually is not "upright" as well, but already slanted — so I think it looks more genuine if the italic version is slanted more than the italic stems. It could also be slightly curved.
By the way, I think the upstroke connecting the s strikes as too thin (compared to the thinnest in 'd', for instance).
Interestingly, the German Wiki shows a different version of that alphabet than the other ones. That might imply something about the alphabet's real life popularity. As much as I enjoy learning German, I'm only a beginner. Andreas, maybe you could shed some light?