First of all, if you're gonna publish your game in a english-speaking site, you should at least have the english language option. It's not that hard to translate a game to english, and I say that being a brazilian.
Secondly, the game is quite confusing when it comes to pretty much everything. How much life have these plants? Are those birds part of the cenario or are they real enemies? How do I get more ammo while fighting the boss? Why the hell do I get hurt every time I attack a bird but they don't even attack me at all?