Uuuuh...
Designing: 1 hour
Music: 1 hour (including learning the song)
Vocal: 3~4 hours (realized halfway through that I had to voice each verse twice)
Picture/Drawing: 1 hour
Publishing/Copyright stuff: 1 hour
Coding the damn thing: 2~3 hours
Fighting Unity: 3~5 hours (Searching various error, WebGL fuckery, resolution shenanigan, compilation times)
Sound mixing: 1 hour (would have put more time if I had more)
... Now imagine if I actually put effort in the thing.