When you export the game, can you put everything in .ZIP file and upload that .ZIP file? Don't upload the files separately (e.g. the .exe and the "boot.config" as two different downloads), that makes things really hard for people who wanna get the game.
Also, the size of the downloads still seems very small when added up compared to the 17 MB apk. I downloaded everything and put it in the same folder yet it still tells me it's missing a .dll.
It's okay though, I understand putting everything together can be hard! But yeah, a .ZIP file looks like it'd be the way to go here! What engine did you use? Was it Unity? Maybe look up some tutorials on exporting your game with that engine?