Call this a homage to TBC if you want.

Yes.do I want green/red open first?
You need TWO of the boulders from the first room to be pushed in the second room. One to get out of the first room, another to solve the second room.
Hint for the second room:Don't try to cover both the red and yellow buttons in the first room... That will do no good. You might try using the red button from the SECOND room, however.
Actually you'll need another boulder to solve it correctly. Try to get one out from the first room. The bonus coins will help you in that.