This is what I would play because there really is no bass, just follow the piano thing...

 
It's really really simple:

G|-------------------------------------------------------------------------|
D|---------------------------------------5---------------------------------|
A|--------------5------------0----3----------------------------------------|
E|--0----3-----------------------------------------------------------------|


But when the real bass comes in it's still really simple:


G|-------------------------------------------------------------------------|
D|-------------------------------------------------------------------------|
A|-------------------------------------------------------------------------|
E|-0------3------5------0--------------------------------------------------|





And then that syth. break I'm not sure what to do there ha..