Bottom left - MAGNUS is a button to select size of shape (will change the description for small/medium/big, this one is big)
Select size according to the note, click on shape beneath to add it to the formula.
Click on the shape to rotate it into position.
This formula asks for small square and with an asterisk for big square. Shapes with asterisks are tricks, avoid them.
Add one small square and rotate it until shining, then slick on the center.
Later on there will be formulas asking for several shapes. Sometimes the shapes rotate in unison with others... The base idea remains the same - locate the shape and size, add to the center, rotate until all glowy and nice, hit it and enjoy the unlocks.