gceden kusmusun yoksa

 I´ll just proofread the turkish text and leave the translation to others to do.

The turkish text has missing letters , the whole sentence should be as follows ;

geceden [bana] küs müsün yoksa ?

Thanks for correcting the Turkish tunci, 

geceden [bana] küs müsün yoksa ?

my attempt

Are you mad at me because of last night* or not?

(because of what happened last night)

Are you sure there is a question? If it´ s "küsmüşün" ? Seemed that you got mad..or not .

  In the context ,"Yoksa " = " or"  indicates that it is a question.

 And another thing,  Seemed that you got mad or you got offended is written with "şs" ;

"küsmüşsün" ---> küs+ müş + sün

 "gceden.." he/ she is eating letters anyway. Sound better to be "küsmüşsün" then "kus musun?"

 Zeytinne, it may sound better to you but it would make no sense if we replace "küsmüşsün" with " küs müsün ?" since we have "yoksa " [unless the sentence continues].

Thanks.

if the sentence continues something like ;

geceden [bana] küsmüşsün yoksa sözlerim seni incitti mi ?

then that would be ok to  put