I thought the whole thing was actually kinda funny with the dying and all. Too easy though. Especially the levels that were easier to do in some ridiculous way than the way they intended. The ones that just required timing were dumb. I wanted a puzzle game, not a game that tested your timing.
David if you do it right you can get huge scores on most levels. Get your level up high and then go back starting at the beginning and just do levels where you drop lots of gem bombs on the waves before they start to get anger, get as many level 6 gems as you can and use them on shrines, that gets you more than creating a level 7.
I ddin't find level 14 hard at all. It took a few minutes, but all it took was running it a few times to see oh now it's getting stuck here, just add this in.