Here is a playthrough of the tenth world. It s unedited, but to save you some time (unless you want the entertainment), use the time links in the description of the video and feel free to mute the video.
The modifier on this world "ghosts" the bottom most blocks on your second move.
The randomly generated levels are the most frustrating part of this world (well for you guys :b). Just keep at it for those levels! As for advice, try to leave an upside down L shape for last, or even a straight line of 3 on most of the colors. NEVER ALLOW A GROUP OF 3 (the only ones left of a certain color) TO BE AT THE BOTTOM OF THE COLUMN. Same rule applies if they are the only three left on the level and they are horizontally next to each other. Watch my attempts if you need more help, see which ones I knew I would struggle on and how I got out of tough situations.