Educational чит-файл №2

Hint: Be patient. Don't throw away marbles thinking you can always buy more. As
you move through the puzzles, the number of marbles necessary to complete them
increases, so save up your points.
                               
Hint: If you need to use up a marble just to trip a switch, run an infinite
loop by purchasing and then using a steel one. They're pure cannon fodder,
good for nothing else, and cost only 100 points as opposed to 500 for the
colored ones.

Hint: Black marbles are transforming marbles that take on whatever color is
needed to match their final resting places. At 1,500 points they're expensive,
but if you despair of getting a correct matchup and have plenty of points to
spare, go for it.