Level 1:Simply flick all 4 purple on/off switches to complete the level.
Level 2:Make all yellow lines point towards the pink dots. If going clockwise that is 6:00, 3:00 and 10:00. I had a little trouble turning the button. I made horizontal swipe at the top of the button, which seemed to work constantly.
Level 3:Set the numbers to 8, 2, 5.
Level 4:Make a zigzag to collect all yellow symbols:
Up 2, Left 2, Down 4, Left 3, Up 4, Left 3, Down 4.
Level 5:With 8 numbers, you need to make 55. Press 6 once, and then 7 times 7.
Level 6:Simply move the squares to their corresponding corners ( blue squares to the top right and bottom left, yellow ones to the top left and bottom right)