Learning Assembly by building Space Invaders

I’ve had a goal for the past 3 years to learn Assembly language. This December I had some time off, and finally put in serious effort to see if I could finally get somewhere with the it. I followed the tutorials in Oscar Toledo Gutiérrez’s book “Programming Boot Sector Games” to create a version of 1978’s Space Invaders. This one is Christmas themed, and you can play it below.