You have a point, although I disagree on the artstyle/visuals part, yes I get not everyone might not like the style but I feel the the BFDI OG style is used to invoke the feeling of nostalgia, also it is actually confirmed that Branches will take place during BFDIA.
Yeah the colors are bright but I actually don't mind that, also I don't think it looks something out of a mobile game ad, but more of a flash game from 2010's or a very cool Mario/Sonic fangame with too much effort /hyp
Also the level design looks alright
But I gotta agree on the jump height lol, it's too high. And I agree on everything else
I'm overall excited on this game, but even this game is not perfect. Not every game is perfect, it has flaws like everything