Hey, it works!
What can I say about this game? While there is not much detail put into it, you really have to give it credit because as far as I know, it's a game that just plain works! You should, however, try to put some more detail into it as there is no sound or background. I think I have played a game like this before and it worked as well. It would take me a long time to figure out exactly how it was done, but I may never. I suppose not knowing how it is done is part of the magician's trick.
There really should be more detail put into it. Everything just seems to have a far too simplistic design in it and there is little to no shading. I suppose that if something works like it should, it is decent. I imagine that it would be hard to put more variety in a game that's strictly a gadget kind and doesn't need flashy stuff to be good. The things it does have should be of higher quality though.