I love this concept!
Also love how you gave a spread indicator and reticle, and how legitimately challenging this game is
However, the shotgun pellets didn't travel very fast, and since there weren't very many, sometimes they wouldn't hit, which was a tad annoying
There was also a bug where crows would continue to show up at patches after they had been destroyed
But this is a genuinely fun game! Just a bit more polish, and I could absolutely see someone playing this on Coolmath games or an arcade in the 90s