Mansion 2048 is a new room-escape puzzle game from Gipnetix Games (developers of 100 Doors 2013 and 100 Doors of Revenge). Available on the iTunes App Store for iOS devices (I assume also coming to Android via Google Play), the game offers a brand new mysterious mansion filled with new puzzles and mini-games for you to complete. Below is a complete walkthrough for each level of Mansion 2048.
Level 17 / Door 17 Answer: Tap the candles on the left so that all four are lit. Then tap the candles on the right so that all four are lit. When the room is fully list, two ghosts will appear. Pick up the cross, select it, and tap the ghosts until they disappear.
Level 18 / Door 18 Answer: Spin the minute hand on the clock until it becomes daytime. Slide the loose panel from the floor to the right. Take the key and use it on the door.
Level 19 / Door 19 Answer: Use the clue above the door to see what numbers to press. The lines represent the borders of the numbers. Press the following numbers: 3, 7, 2, 5, 8
Level 20 / Door 20 Answer: Challenge: Match the cards until they all disappear.
Congratulations! You’ve completed levels 17 through 20 of Mansion 2048. Continue to levels 21 through 24.