If you are using a PC with keyboard and mouse, WASD controls the left item, while the arrow keys control the right. Pressing WA or Up and Left goes diagonally that way, WD or Up and Right makes the icon move that way etc.
I found it very difficult to control the right icon with the mouse, so I tried the arrow keys as an alternative and it worked perfectly.
That's good for you, but when your hands and fingers are not as nibble as a twenty year old its very unlikely persons of my age will ever get through the puzzles. So please if you will add a stop timer. Please.
Well, I am 70 yrs old and had trouble with the later timer puzzle, took me 4 days on and off, to finally get the hang of it. I use the keyboard for the left disk and control the right handed disk with the mouse. Second play through it was a lot easier.