did try the lower health with 20 and gain more xp skill to see how it work, and nothing happend, i do not gain more xp and i do not lose any health. think you should fix that :)
Love the game!
but the killing rate is very random it seems.
also i would love that you had to research the plane instead.
maybe be able to research things like the radar. Be able to build AA guns in the cities, give a % for defence.
Be able to upgrade the plane maybe ?
love the game anyway!
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 "Spitfire: 1940"){kind=icon}