Is pretty easy to win with high rate shoots and multiple shoots upgrades, seems like the damage increase by its own, im not sure if its a level limit for each upgrade, i just can keep increasing the rate of fire like crazy. Found a dew problems, like when multiples shoots fills the screen they start to avoid hitting enemies and pass through them, and when you die the score reset but the upgrades still on! so that means you can keep increasing the rate of fire even more and easy, making the game long and boring after a few minutes.
+Easy and addictive to play
+features like damage and multiple upgrades
-Same bar-shape enemies all the time
-Long and boring to keep trying to level more than 7
-Problems on Restart button keepping the upgrades and the bullets avoiding enemies.
3/5 I still like it,