1. Go to left of rocks push button with 2 dots
2. Go to opened shadowy recess in wall (not low hole).
3. In recess push button on left wall.
4. Go through low hole.
5. On right-hand side push button on top of wall.
6. Go back. On left of rocks (where first button was) pick up dynamite.
7. Blow up rocks.
8. Walk behind where rocks were. Enter microsoft. Button depresses itself
9. Walk out (1 step). Look towards left of large shadowy section (where second button was). Go there. Anywhere else resets the whole thing and you'll have to restart.
10. Click again. You should see open door. Leave.