I broke the game:
1] Acquire absorb (or the block-absorbing rune, presumably)
2] Cast cloud rune using a high tiles-effected target rune (plus cheap attack runes, if necessary.)
3] Cast cloud-absorb rune using the same target rune (plus cheap attack runes, if necessary) to add a power buff.
4] Repeat indefinitely, resting as necessary.
5] Revel in your newfound unlimited power, as you cast 40,000+ damage with a single flux point.
6] Try not to accidentally target yourself.
Fire should be switched on and off with left click, rather than having to hold it down. Additionally, having to use momentum for your bombs makes laptop gameplay very difficult, which for a flash game is an automatic -2 stars.
Some advice, though:
1) A few of the middle planes should have been replaced with weaker planes, but ones that could use multiple items.
2) The amount of money awarded per kill should vary more from the weaker to stronger enemies.
3) Stats should be explained more fully on the plane selection page.
Good game. Unless there is something I am missing, though, it should not be possible for someone to have the medium badge without the easy one- which is the position I'm in. There's more to life than badges, though, I suppose.