Questions in Game Dev

What do you guys think about customizations in shoot em ups? what is considered great customization?
I will work on a system that allows you to unlock and change the weapons of the ships depending on its type, not stricting each ship to a specific weapon
Someone can help me? How do I put gamejolt achievements into a game made with Gamemaker Studio 2?
edit: Ok, I guess I find something: https://gamejolt.com/games/GMS2GameJolt/528282
thanks to @DustBunneGames for this :D
now just figure out how to put these things in my game :P
I want to know where I should start for games. I want to make my first game for my website. Maybe also When I learned more about coding, I want to make a family friendly social media.
real question devs does shooters need muzzle flashes? lol
I'm having a lot of issues with making one my mesh is weird asf
[KK 2]
KK2 Is Now In Development
bcs fnaf 2 is amazing
i got a question. In the game
What else should I put on PC?
How does one make a good text based cutscene to play inbetween levels?
I have no clue how to appeal to players with text cutscenes and I wnt to fix that.

I have been toying around with the idea of making a Touhou RPG set in the universe of the HOI4 mod "The New Order: Europe's Last Days". Interested?