pretty cool! the game is pretty good overall, but i saw on your game page that you want feedback, so here we go!
the bullets had low contrast compared to the floor, meaning they blended in (i didn't really notice the bullets until i looked closely) - the graphics were pretty good overall, but the only problem i saw was the contrast/colors... i would recommend using a limited color pallete (i recommend Aseprite's DW32!), using one can make your game look way better!
there are also some quality-of-life improvements that can be made, for example, your gun shooting automatically when holding down left click - you probably used
Input.GetMouseButtonDown(0);
but, you can easily change it to
Input.GetMouseButton(0);
so that it will automatically shoot again when you have your left click pressed!
overall it's a pretty nice game, good job! :3