Under rating threshold (hideshow)
Would like the upgrade screen to be more trasnparent - maybe a user setting?
So you can keep upgrading while keeping an eye on the action.
Or maybe have the upgrades on a side bar so it doesn't obscure the action
Thats because the tower can never be sure that a missile is going to hit an enemy. So he fires again while the first missile is still flying. I might change that mechanic if it's too annoying.
EDIT: Fixed it in the new version. :)
I'm sorry to hear that. What browser+version are you using? Have you tried refreshing the page multiple times? Sometimes it takes a long time to download all assets.