Can't make more than 4 points ... LOL! I find it a little bit too hard, but that aside: very nice graphics and the sounds are a nice addition but a little bit too loud. Also, it being your first rl it's a great accomplishment!
My next update before deadline will add some powers to help even the odds! Also, you're the second person to mention the loud sounds, I may have to tinker with the master level audio on each sound.
Finally, thank you for the compliment! I think I've fallen in love with the genre more so than previously now that I've actually worked on it.