This is a ton of fun, I love how all the different elements work together and balance each other out, tons of great risk/reward mechanisms. Great take on the theme, the UI throughout sells the experience very well. The game went a step above once I had to start dragging stuff around; the icons to avoid krotana or moving/resizing nerfshark was a really great dimension to add to the game. (Nerfshark speeding them up if you make it too large is *very* funny)
A few UI things should maybe be a tad easier to handle, I think a box that better shows the bounds of the X button and a bit more leeway in resizing nerfshark would feel a lot better to the player without sacrificing much real difficulty.
Obviously would love to see more apps (and toolbars!) in the future if possible, great work