Stuck on 4-20

Answer from: Miss Sue 1360
I was stuck on this level for two months, and finally got it today! I'm not sure exactly what I did, but I know I started by building outside the halo by the orange star cube before breaking down the cubes in the middle. If you get a green or an orange cube first, you can place it below the orange star cube, then add another cube outside of the grid. Replace the outside one with the first full orange cube you get. If the cube directly under the halo is orange, you will need to slide it away with a different color so your orange doesn't disappear. Once you have an orange block outside the halo, you can build it higher. Also, I didn't try to save the green cubes below the green star cube on the halo. I waited for a solid green, then broke it through and built up on the far side of the halo. For a while I thought this level was impossible, but it isn't. Good luck!