You must find 20 dollar bills:
#1:
On the floor, next to the couch on the left.
#2:
On the floor, next to the curtain on the right.
#3:
On the ceiling on the upper left corner of the screen.
#4:
Look at the brown lamp next to the left window. In the top of the shade.
#5:
Look at the brown lamp next to the left window.On the ceiling in the upper right corner of the screen.
#6:
Look at the couch on the left. Under the right grey cushion.
#7:
Look at the couch on the left. Under the left brown cushion.
#8:
Look at the couch on the left. Above the right brown cushion on the window frame (very faint).
#9:
Look at the pictures above the fireplace. Behind the picture on the right.
#10:
Look at the fireplace. At the left on the top of the yellow border.
#11:
Look at the table in the center of the room. On the left corner, just above the leg.
#12:
Look at the red bowl on top of the bookcase on the right. On the right side behind the bookcase.
#13:
Look at the red bowl on top of the bookcase on the right. Above the window frame on the upper left corner of the screen (faint).
#14:
Look at the blue bowl in the bookcase. On top of the brown cushion on the right.
#15:
Look just in front of the bookcase on the right. On the dark blue book.
#16:
Look just in front of the bookcase on the right. There’s one on the floor.
#17:
Look at the yellow lamp in front of the window on the right. At the curtain rail on the left.
#18:
Look at the armchair on the right. Behind the top of the brown cushion.
#19:
Look at the armchair on the right. Behind lamppost at the top.
#20:
Look at the base of the yellow lamp on the right. In your inventory at position 20 is now a small bill… take it.
Leave the house by using the green arrow on the south.
Game source: A copy of the game was found here on the internet.