So I've been able to beat the daily challenge twice. The trick is to focus on making the special jewels... flame, star, etc, because those are the only way to break the blocks. I just keep creating them and then when they "float" to a good place, I detonate them. Also, because the board is always floating, eventually the special stars will float into just the right position and will detonate themselves, clearing blocks with fewer manual moves needed.
Also, remember that you can match/combine 2 special jewels even if they are not of the same color. My FAVORITE special jewel is the round one. I can't remember what it's called. But when you activate that one by selecting a certain colored jewel, it turns all of those colored jewels into the hyper cubes. And if you match 2 hypercubes it clears the entire board and GAME WON in a flash!
I'm actually enjoying this game. I like the graphics and the music.