I had difficulties learning assembly from existing games, as these are typically too complex for me, contain too many lines of code, and sometimes require special libraries (include files) I do not understand. So I updated my crude demo game „Shooting Stars“ to version 2.0 at https://github.com/jklingel/ShootingStars/releases/tag/2.0. Do not look at the code if you already know how to move a sprite around and make it interact with e.g. the background 
To see how a simple title screen with music can be created, take a look at https://github.com/jklingel/ShootingStars/releases/tag/1.0. Again, I kept this separate to make it easy for the beginners like me.