Nice to see another Brazilian dev in here! The game is really glitchy tho. I can get damaged by enemies even when I'm outside the mini-game. For some reason the mini-game health carries on to the real life. The enemy generation could definitely be improved, most of the time they spawn up in the air, which makes them hard to find. It's also hard to avoid enemies shooting you.
I really think the game has a lot of potential, it looks very good visually (tho some more visual flair and better models would be cool). The concept is geniunely GREAT, it's super creative. The music is nice, and sound effects are cool. The gameplay loop also seems awesome. Great work!