The Game Genie code 'Fun house is free' should work for getting to the FUN HOUSE level.
This game is very charming and the graphics is adorable, much like the previous game.
Malu and I worked together on beating the 4 short but difficult minigames, which gives you 4 golden coins that gives you access to the FUN HOUSE. This level has infinite continues, so we decided to stop and cheat our way to it another day.
completed the game (MiSTer).
We did it! After almost 2 hours of practice, we beat the FUN HOUSE level! As usual for NES games, the last level was a nail-bitingly stressful affair, with 3 hit points and no checkpoints.