stuck ? here's a few tips

This needs some observations.

Find :

- switch near the door
- bulb ( need activated switch, then look ceiling take bulb )
- dried glue ( near TV )
- 2 key parts ( both located at pictures. Look carefully )

Use bulb on white lamp, it will heat up.
use dried glue on it; it will turn melted glue.
Click melted glue first, then 2 keys, it will join as 1 key.

Calendar : use ROYGBIV (rainbow sequence)
and enter the 8 digit numbers to the phone.

Phone will generate [new number].
use [new number] on piano.
enter correctly, and box will appear on top of piano.
click on it. Level completed.

Try not to use hint, can you solve it