Wow! Thanks a lot for your feedback!! I have found that a lot of people who played the game had the same problem with camera and with understanding how bullets work.
Interesting thing is that a simple goal (like score points requirement) can "hook" the player for longer game sessions. For example, my friend played this game for an hour just because I told him that he must get 50 points.. And he did it, while having a great time learning mechanics!
Btw his record is 56)
That's why I love game jams!