To select the color of the shape you would need to use the Fill Color Box.
Changing Shape Colors in Cricut Design Space If you need to rotate your shape, you can do it by selecting the shape and clicking on the curved arrow on the upper right-hand corner of the selection or, if you need to rotate your shape in a precise angle, use the rotate box located on the menu and type in the angle (just numbers) you need. To unlock the proportions of a shape, either select it and click on the little lock located on the lower left-hand corner of the selection or select it and click on the small lock located on the top menu in between the width and height options. To be able to edit your shapes freely on the x and y-axis you need to unlock the proportions. Something fundamental to learn with shapes, and any other images or text in Cricut Design Space, is that everything is locked this means that when you try to increase the size of a shape, the change will be proportional.
Change Size, Unlock Proportions and Rotate Shapes in Design Space