Wow! Incredible game! I'm amazed at how you've managed to combine all the graphic and sound elements to create a survival game that is both entertaining and highly engaging! The fact that there are so many different levels is astonishing. Perhaps initially, I would add simpler power-ups or more complex level-ups to reward the player and to see more enemy destruction, ha, ha. I would also pay a bit more attention to uploading the game to itch.io; the window comes up quite large and is a bit overwhelming. Despite this, I think it's an excellent and very well-polished game! Great job!