The song is pretty east.
Standard Tuning.
The whole thing is A Bm with a few variations.
A Bm
I think that I was still dreaming
Bm A
Caught in the morning sun again
continue through chorus ("Is this an uncommon thing")
A
Floating weightless in your eye
Bm (see diagram)
What's this fear I sense? It's all a game she says
When Brock sings "says":
A A7 G? A
e|-------0------0------5----|
B|-------5------5------3----|
G|-------6------6------4----|
D|-------7------6------5----|
A|-------0------0------0----|
E|-------0------0------0----|
Thats it!
Source: https://tabs.ultimate-guitar.com/tab/perpetual_groove/left_to_drifting_chords_963835