Donut Ghost House is the first, and most simple of the Ghost Houses. You can get there by getting the normal exit on Donut Plains 2 or Donut Secret 1. The only thing that makes this level recognizable is the fact that the secret exit leads to the Top Secret Area. On closer inspection in Lunar Magic, it's actually the NORMAL exit that goes to the Top Secret Area, while the secret exit goes to Donut Plains 3. Super Mario Advance 2 corrected this.