Thanks! I'm glad you like it.
My thinking is to keep it as simple as possible while allowing for greater depth of strategy. There're some more wrinkles coming to make it even deeper.
Thanks for the input on the mouse controls. I actually had it so that when you sent planes to an enemy it deselected your islands, but I found a few issues with how that works. I implemented the A and S buttons to select and deselect all, to solve that, but I can see what you're saying. I'll take another look at that for a future version.
Completely agree on the randomness having pros and cons. The next update will balance the gameplay a bit more, so that it's not possible to be dropped into an unwinnable situation.
Agree on the audio also! I've actually already lowered the volume in the next version.