4 Keys Escape

[sivigames]

You were trapped in the modern house. You need 4 keys to escape from the house. Solve all the puzzles to get four keys for the escape. Use the clues left in the modern house to solve the puzzles. All the Best! Good Luck! Enjoy the Game!

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Please use spoilers for hints and walkthroughs:
[spoiler=Title Here]Enter text here...[/spoiler]

Please do not post a video walkthrough for 7 days.