i liked the ambiance. but i had a few issues:
- when all bullets are used it does not automatically restart. also there was no way for me to restart the game so i had to do everything all over.
-the aiming is a bit hard at first but got used to it.
- i have a tip for you instead of giving the player easy game and hard to master controls do the opposite. give him an easy to master controls and hard game this way the player it will incentivize the player to play again and again.
- add a few targets that the player should not shoot. moving targets maybe.
- add an option in the start of every level options for weapons the stronger the weapon the harder to control (if you want to keep the aiming as is)
and for a first submission you did well.