Great game! I loved the music and art, even though it was simple. I liked the double wave idea. I appricated the tutorial and the weapon recommendation - it was really a great idea, as I assume you had fun implemented various weapons, and recommended the ones who worked the best - I tried all of them, and my favourite is the one that rapid fire and bounce around
It was a little bit of a slog though, as there were only 2 enemies, and you unlock weapons slowly. Honestly the only upgrades I took were damage/fire rate - the rest seemed less needed. Also the game didn't full sized properly for me - it stay on the top left
I tried to screenshot the last screen but windows didn't save it for me for some reason - I think I survived to wave 23 or something like that - with more enemy variety and maybe faster progress and less issues, this one could be really awsome. Great job!