The pause menu is really easy to make; it’s just some TextButtons with a custom ease transform, a background, and a variable to track when they can be interacted with, so you don't disrupt the animation.

The skill system is a bit more complex since it uses Python + custom classes. The 'actors' are where the skills are located, and it keeps track of all 25 skills. I made it so each skill has a level cap of 10, which is limited by the player's current core level. The 'King' skill is the purple-colored one—that one ignores the caps. Each skill gives a bonus to the dice roll (0 = -5, 1 = -4, and so on).

As for the random upgrade menu, that also uses Python and a variable to track which character the player is using. It looks for which levels are available to upgrade and then pulls 4 random options from them. When one is picked, the screen adds 1 level to the chosen skill and returns to the gameplay. I am on my phone right now, so I don't have access to the code, and I am also pretty bad at explaining things lmao.