It's hard to believe you didn't copy the vocals from the original!

A Good Start...

But one of the things that's beautiful about Wonderwall is that it feel so personal, it's so one-on-one. It feels as if the singer is singing right to you and means every word that they say.
What I think you need is someone to sing this to, to make it that level of personal and meaningful. It's not exactly something measurable or sometimes even noticeable, but it brings this great quality to the music that I feel you're missing here.

DUDE!

This is an amazing cover of Oasis. I have heard a few covers before, and believe me some blew my mind, but this cover is just amazing. You put a moderner (if thats a word?) spin on a classic song. You really have talent dude. Use it man.

Nice

Used to be my favourite...
Nice cover :)

I think your on the right track

I really do think you are on the right track with this cover. Overall its not bad but I think it can be better. Its a great start and I think you have a making of a great cover, Just some adjustments and you will have it