Thanks :)
Like i told your teammate i packed in as much as i could , and most of the absent elements are due to a mix of lack of time / knowlege on my part so hopefully i'll keep improving as time goes on along my journey.
Specifically on staris, i made the collisions classic box shapes and didn't try to change them in fear of breaking the game completely as i'm not sure if this would have made some jumps more difficult, but i should have tried a capsule shape instead just so that the stairs would be less annoying to climb up, or not have any like these in my level design.