It's amazing you did everything yourself. I love the the the art style of this game; it's very clean. I also enjoyed the roguelite-type of gameplay this game provides. The slot machine mechanic is unique and adheres to the theme.
Now, there were some bugs present in the game that affected the overall enjoyment of the game. When the mouse chases me and reached me, it's kinda stuck to me the whole time; but it's kill-able though. Another thing is the movement of the player: I could not outrun the mouse when i move vertically or horizontally, but diagonally I could outrun them. It could be a feature, but I wanted to outrun them in all directions. Also when I reach the end of the map, the UI leaves the screen which should not be like that. If you're using godot, make sure to put your UI in CanvasLayer so it won't happen.
Other than that, this game visually needs more game juice I think so shooting the enemies feels more satisfying or hitting your favorite weapon could be more satisfying . The music could be more energetic as this is a fast paced type of game.
Overall, this game is really enjoyable. For a solo developer, you did a really great job! Congratulations!