、。
I'm so drunk right now that the keyboard looks like it's doubled.
Literal
Now, keyboard [subject-が] doubled [looks-て見える] [to-the-degree-ぐらい] am-drunk.
A casual, self-deprecating admission. ダブる is a loan-verb formed by attaching -る to the loanword ダブル ('double'): ダブる ('to double up,' 'to overlap,' 'to appear doubled'). Very productive in casual speech for loanword-derived verbs: メモる (take notes), ググる (google), サボる (skip/skive). 見える ('looks, appears') in the ~て form chains to the previous verb — ダブって見える = 'looks doubled.' The ~ぐらい ('to the extent of') scales the intoxication level by reference to the symptom.