Nice game, but the revive perk isn't working, also, the upgrades seems not to be working as well.. i've put only on dmg from lv 1 to 12, and yet i take the same ammount of shots to kill any of them...
The way to defeat the last boss is:
1 - laser shot the 3 barriers to make the golden lines disappear;
2 - rocket passing that tiny maze that exists in both sides, which will make the small gold line that protects another spheres disappear
3 - laser/rocket/cannon shot the small sphere, then it will make the red barriers in the middle part disappear
4 - destroy the spheres that are connected to the boss, and then the ones that are on the top of the screen (in the left and right sides), which will make the shield protecting the boss to disappear.
5 - rocket the boss in tha head (i recommend that you gather a lot of missiles and do that in just a single turn).
Enjoy the ending! ;)
There's no way it still takes you two shots to kill the first two bears that appear, the red one with the picnic basket and the blue one with the sub.