The sentiment and imagery are compelling, Hugo. The lyric needs to be revised though to make it stronger and easier for people to relate to or even understand. Some of the lines are confusing. Tim has already made excellent suggestions.
Here are a few of my own. Keep or sweep, of course. 
Donna
V1
I´m a shadow of the child I used to be
All the beauty inside has vanished through the years
Each day there was something new to see and learn
But time after time my innocence was burnt
PreChorus:
When did it happen
Who is to blame
The change shattered
My life and destroyed my childhood games
V2
In the world that I lived in, I didn't care
About the god called money that rules everywhere
I´d never dreamed there were ways my soul could bleed
Or that I'd ever be confronted with lies and greed
PreChorus:
Chorus:
I don´t wanna be
I don´t wanna be an adult at all right now
I don´t wanna see
I don´t wanna see the world go down
V3
Indifference and selfishness are what I've had to fight
„Obey!“ „Work!“ „Pay!“ „Die!“ is life with we all satisfied This line needs to be reworked. Lots of ways you could do this. One possibility is 'Obey, Work, Pay' Die, these can never satisfy. Not a particularly good example, but simply to launch other ideas.
PreChorus:
Chorus:
I don´t wanna lose
I don´t wanna lose sweet innocence
I don´t wanna feel
I don´t wanna feel the blood of childhood on my hands