This is very nicely done for a alpha future work is needed add some more difficulty this game is very easy does makes it boring over time but keep at it and you'll see results

Good job, man!

It's a cool minigame, easy to play and good to spend time.

Might want to tell players how to reload as right-click is not usually used on web games (yes right-click is reload, left-click for us lefties).

Now I have not played Resident Evil 4 but the Author Comments is more horrifying than the game itself. Is that description as Leon a reference I do not know about?

not bad for an alpha, but more work is needed to make it a complete game.
First, makes the shoot counter to 5 and let the player reload anytime, even before his count is empty. It can be crucial if later there are waves of crows and players cares about combo. They will naturally reload between the waves.

Second, put more attention to details.
You are working with C2, so it is easy to put a "mirror the sprite" when the crow bounce against the border, to give the feeling he turn around. In the same aspect, all crows start from left to right, so it is "boring". Add a chance that the spawned ennemy start reversed and you already create a bit of variation. And of course, "start" and "instruction" buttons in the start layout can help players who are not used to your game's controls.

Keep it up, if you spend some time on it this game can reveal good potential. ^^