This is Blueshift!!!
Almost a perfect game. Everything in there was so well done its hard to describe. The only things I just felt like it could have been better is the weapon system and the difficulty level.
For the weapon system, I loved the fact that you keep our weapon level bonuses even after we die, but sometimes we get to a point where we actually want to -dodge- the so called "bonuses" (weapon swaps dropped by those medium ships) to not lose our current weapon.
For the difficulty, no matter how many options we have in this game (and how cool it is to just pick them up to see them in action), it eventually comes to the only 2 usable weapons in order to actually play the levels: the electric shock and the homing missiles. The rest is hardily usable due to the large amount of indestructible shots from even the smaller ships that makes almost impossible to actually stay anywhere near their front.
That is not saying much, because after beating level 4a, I simply gave up. I already had had all the weapons on max level but non of them were good enough (no matter what ship I picked) to handle the upper levels. Enemy ships took just too strong to get destroyed, which eventually turn your screen on a rain of red dots. I found myself several times in scenarios that no matter how many times I try to shield or dodge, I would get eliminated. From my point of view you should have made a way to somehow combine weapons, cause the limitation of the game lies in the fact that you eventually cap your levels, but the stages kept on growing.