Fun idea!
- At 0:33 there's a wrong note in the melody, it goes c#-d-b-f#, the original goes c#-d-c#-f#.
- In the buildup, the vocal synth sounds great.
- In the Goodbye part, the chord progression doesn't really fit. The original is in F# minor and your version is in D major, so for example the G in the bass is really dissonant with the melody g#-a-b