A fun little game, congrats on finishing your first game! A dotted line going from the player to the mouse cursor would be nice to have a better idea where I am shooting. While playing, my eyes are on the player and my mouse cursor is at the bottom of the screen, so I am kind of guessing where to click to shoot, often missing the target. But it is really satisfying when you flawlessly hit multiple targets in a row. Also, it would be great to see your best run with a highscore next to your last score.
One more thing, for those that try to run the game on Linux (like another commenter did), as suggested by the message in the terminal, open Vertical Weapon Platformer.runtimeconfig.json and under "configProperties" add "System.Globalization.Invariant": true. That should do it. Source: I am on Garuda Linux and this worked for me.