Thank you for enjoying my little game, (now I'm regretting) I wanted to add more enemy types like actual Russian planes but I didn't do it, worrying it will fail. Now that I see almost everyone asking for more enemies I'm regretting my decision. Nevertheless my project is a mere proof of concept and I'm already working on a more detailed drone simulator after listening to these reviews and comments.
I decided to make graphics simplistic so that everyone could play my game and enjoy this fun experiment.
Again thank you so much for your valuable review you motivete me to improve and continue with my journey. I hope you good luck on your game and stay strong.