Awesome job for a person who just learned GMS! It working smoothly and well. The idea of lights and bugs is very funny. Nice core gameplay for the tower defense game. I'd love to see where it will go, imagine turrels and different fly swatter types :D
It's simple yet the gameplay is perfectly understandable and loved the education. It was hard for me to kill all the flies but probably you should test on different people who are more accustomed to action games.
TOP music! really interesting and sounds great you got talent!