Very nice game !
I love the gameplay with the shield box that can be destroyed, the music is cool and your menu is awesome ! The only one negative point is the difficulty, auto target turrets are very efficient and it is hard to calculate a patern to succeed.
I did not reach the "i'm sorry" level and i tried some following levels but when i died, i came back to the "i'm sorry" level, it is not a major issue but it is just to inform.
Crongratulations for this game, i enjoyed testing it !