I had to come up with my own strategy for 10 though

???

Thanks.  I knew it had to do with the convergence of the lines, but I never held the mouse long enough to see the point.

Man, that game's strangely addicting.  I'm currently sitting on #16 - it's not hard to figure out what to do, but the pattern is a little tricky.

Can you help me with 8?

You gotta keep clicking.

SPOILER

cheats for levels 1 thru 20.... don't read unless you want to know!

level 1
Take the key and click on the door.

level 2
find key in top right corner, find door botom right corner

level 3
catch falling key, catch falling door

level 4
bring number above key to 1, then bring number above door to 1

level 5
click and hold in the circle and drag upwards, quickly get key!

level 6
press down arrow then press up arrow (on keyboard)

level 7
fire at key then fire at door, you have to aim slightly above

level 8
click rectangle then click left door lots, get key. Click rectangle again and open door

level 9
click on arrow and hold while moving the mouse in the direction of the arrows

level 10
repeatedly click the rectangle untill all lines meet, then click lots on that area until you get the key. Do the same to get the door.  put your finger on the area where the lines met so that you remember exactly.

level 11
right click on the ‘I want a key’ and select. Right click on ‘I want a door’ and select

level 12
you can only move one square at a time, keep serching for key then door within the time limit. While you are playing it, they stay in the same place. However I just tried it again and they have moved positions

level 13
aim high to hit the key, as the cursor flies past keep clicking to pick it up. Same with the door

level 14
Move the vertical knob up until all the numbers line up. Then move the horizontal knob to the left and a key will appear. It’ll also unlock the numbers box on the right then you have to arrange the numbers front to back as they appear when you move the vertical and horizontal knobs

more hints
after getting the key, you shift the numbers. You have to overlap all of the numbers at once, and the number you can see is the one that goes closest to the F. Then you have to find out which numbers overlap which other ones, and you try to find out the order in which they go. Certain numbers will always overlap certain others, so the first one will always overlap the others, when you put them all together. So again, you’re trying to shift the numbers to see which one will go on top of the other one, when they are in the same place, and arranging them in that order on the side bar. I don’t think there is a simpler explanation possible, though the best one on this site wasn’t as good as the one that helped me figure it out, on another site

level 15
Drag the horizontal yellow line to the left. The door will collapse. Take the key. Grab the door, hold the left click and move the cursor over the game screen line. You will hear a click and the door will stay up. Click on the spot that you noticed by now (it looks like a handle).

level 16
press the circle in the middle. you have to keep the same number in the right that is on the left. at 40 or so you get a key and 100 a door.

level 17
if I remember correctly, you should move the small vertical thing, then the big horizontal thing to the left. Then put the small thing on the big thing and make a hammer. Use it to hit the square space until it cracks.

level 18
don’t click, type START, then type the next words that appear as fast as you can to get the key.

level 19
When you move the circles, you can see that one number appears on top and the rest of them follow. You have to figure out which one is first, second, third, and so on… and on the end, which one is on the bottom. As you discover, put the respective number in the squares in the column on the right.
Apparently the combination changes, so I can’t help you with that. In my case, the number was (from top to bottom) 6521034. That was the order of the numbers, not by first appearance, but I started by which number appears last, i.e. which number is on the bottom of the pile.

level 20
Click the yellow board. Check the time on your computer and set the numbers. Take the key. Click the yellow board again. You know what to do

Wow, I suck.  I can't get 3 so I skipped it but it is bugging me.  I have a laptop and no mouse...is that why?

I have a laptop too- no excuse!

thanks, so I just suck! :o

I got through 13.  It took a while to figure out I only got so many chances, which seemed obvious afterwards.  I'm stuck on 14, and the spoiler didn't help.  Does the door appear when I do it right?

Ummmm...my 19 was a dresser.

you beat that one??
im stuuuuck.

I got through 13.  It took a while to figure out I only got so many chances, which seemed obvious afterwards.  I'm stuck on 14, and the spoiler didn't help.  Does the door appear when I do it right?

the door appears when you slide the slider things

the order of the numbers on the side for mine was
0
2
3
4
1
5
6
dunno if they change

They change.  And yes, I beat that one.

Double h, whenever you get the two knobs in the middle of their respective lines, all of the numbers will converge with one number on "top".  The 'top' number is your starting point.  If your top number is 4, put the 4 next to F (I thought of the f as front, the r as rear).  Whatever number that would be directly under the 4 in the 'stack' (slightly adjust the knobs to figure this out), you would put next to the 4.  Repeat until the box at the bottom left has a 7 pop up in it and the door should appear after that.

Does any of that make sense?

This game is soooooo frustrating! Not a fan!