the back of the numbers note, from under the phone, has a pattern on it. the computer picture has a pattern on it, too. if you slant the lines on the straight one in the same way that you see on the back of the note, it makes a different picture on the larger version.

found the flower code, down where the night-light/key was.

it's on the inside panel of the left-hand switchbox, under where the color code for the door is.

ee! creepy purple line!

for block codes on cell phone
1st column shade bottom
2nd column sade first two
3rd column shade top and bottom
4th column shade middle

The Night is Over
SPOILER: (click box to reveal/hide)

1. Click on the door stopper (purple color on the floor)

2. Click on the blinds and reveal the Star.
Go to the computer and do the shading on the Star.

Still exploring what is next.

count the posts. where is there the same number of objects?

the posts can be yellow or white. where is there yellow and white?

make the posts the same as the lamps: yellow, white, yellow, white, yellow, yellow, white.

click on the side of the screen until you see a little green bar. click the green bar twice to open the blinds.
back out and turn left. click on the patch of light on the floor.
pick up the key, and turn on the lamp. back out.
click on the wall. highlight the number 7. write down the placements of the numbers.
back out, turn right.
click on the phone. pick up the receiver, and press the hang up button. pick up the battery. make note of the little rectangle off to the right side, on the wall, and that it comes from the phone. back out.
click on the box that is now lit up under the phone table. use the key to open it. click on the blue ball, and it rolls away to the left. click on the box again and get a note. write down the numbers (the seven may be backward, but the numbers are in the right order.). the pattern on the back is a red herring. back out.
click on the little blue ball twice. a series of posts is in front of it. click on them to turn them yellow in the following pattern: yellow, white, yellow, white, yellow, yellow, white. now the series of posts is a switch that will take you between the number field on the wall, and a key pad.
the number field corresponds to the buttons on the keypad. enter the code from the note under the phone table, according to the placement of the numbers. back out.
turn right twice and click on the wall above the desk to open the blinds on the big window. the left drawer contains a battery pack for the light under the desk. we'll use that later. open the laptop and make note of the pattern. back out, and click on the wall, above the desk, to the southeast of the window. there is a code there: equals, flower, phone, hearts. this is for those little rectangles around the room, and will be used later.
back out and go back to the phone. enter the pattern onto the phone. 1569832407, then press the green call button.
back out, turn right twice. zoom in on the two bottom boxes. click on the left one, and hit the switch. make note of the rectangle on the inside of the door - this is the "equals" one. back out and turn left.
zoom in on the fuse box in the upper right corner. flip the blown fuse. back out. go down to the night light on the bottom left. pick up the other battery, and plug in the cord. back out.
put the batteries in the left drawer of the desk, and close the drawer.
make note of the star pattern on the floor. back out and turn right. go back to the weird machine with the boxes on the wall, and enter the star code. (press each of the white buttons in order, from right to left.) press the big button in the middle, and get the flower lamp. back out.
turn left, go back down to the night light.
unplug the cord and plug in the flower lamp. make note of the rectangle on the right - the "flower" one. unplug the night light, click on it again, and get a key. plug in the other cord.
go back to the desk and use the light bulb/key to open the locked drawer. get a red gem.
put the red gem in the big button that opened onto the flower lamp.
go back to the desk and open the lap top. click on the white button to turn it on. open "unlock.exe". the little black pacman guy can only turn right. you have to get the star. if you get stuck, here's the solution, courtesy of Bluey:

SPOILER: (click box to reveal/hide)

wait for the "boss fight" to resolve itself. ignore the little star in the corner for now.
go back to the two boxes below the star pattern. the right box is now unlocked. pull the red handle. make note of the number on the handle: "060-"
there are strings of numbers around the room, that make up another code. in the patch of light from opening the first blinds, there is "-2619-"
on the fuse box, there is "-1734"
putting them together with the "060-", we get the code: 06026191734 enter this on the phone, then press the green call button.
back out and turn left twice. find the cel phone on the floor. send the message.
go back to the laptop. there is a picture in the email now, but it is also a red herring. it relates somehow to the pattern on the back of the note, but it is never used.
go back to the cel phone. make note of the color order on the "empty battery". now, go to the door. there are four heart shapes, and the colors on them are controlled by the stars. make note of the rectangle - the "hearts" one. fix the stars so that they match the battery colors. (blue, green, yellow, red)
open the door. click on the little thing on the ceiling, above the door on the outside. at this point, make sure that you don't touch the stars, because you need the door to stay open.
get a new pattern for the fuse box, and enter it.
go back to the scrambled keypad, on the first wall above the yellow and white lamps.
there is now a handle-looking thing, and two circular depressions with a blue circle and a red diamond inside.
pick up the blue sphere and the red gem again, and place them in the slots. a button appears in the shadow over the "handle".
pick up the cel phone and put it in the "handle".
here is where you enter all the little rectangles we already found.
watch the purple line run out the door.
open the door again, and now there is a little purple dot on the floor, next to the edge of the door. click on it. this holds the door open.
turn around and go back to the first window blinds.
hold them shut, and get the code for the star on the pacman game. enter the code on the star by clicking the gray dots until they turn black, then click the blue circle. watch the "boss fight, take two". click the little star above "the end".
a message reads, "the night is over". the room is now fully lit, and the game is finished. go out the door, you escaped!

Open the window, yes. One panel left from the window you now have light, click down there, lights come on. I assume you've done this. Now, when you are looking at the numbers on the wall, click on the number 7. Things will open up to from there.