Here's the riff that repeats throughout the piece
e|---------------------------------|--------------------10--|
G|--6-8-9-6------------------------|--6-8-9-6-------8-------|
B|------------5---7-------5--------|------------5-----------|
D|--------------------6-----5------|------------------------|
A|---------------------------------|------------------------|
E|------------------------------8--|------------------------|
[ Tab from: http://www.guitaretab.com/m/misc-computer-games/378805.html ]
And here's the bass that can be played alongside it
e|---------------------------------|------------------------|
G|---------------------------------|------------------------|
B|---------------------------------|------------------------|
D|---------------------------------|------------------------|
A|--------3------------------------|--------3---------------|
E|--1------------------------------|--1------------3--------|
It's quite an easy piece and very repetitive