Unity guides
One question, one post. These are recipes you can land on from a search and leave again — unlike the course, which builds one project from start to finish. Each post says which lesson does the same thing as part of that project.
Raycasts: asking the world what is in front of you
How do I detect what the player is aiming at or standing on?
in the course — Character & Combat: Projectiles, damage and VFX
Instantiate: spawning prefabs, and reusing them
How do I spawn objects from code?
in the course — Basics: Spawn a grid from code
Coroutines: doing something over time without an Update
How do I make something happen over time, or wait before it happens?
in the course — Character & Combat: Skill system with cooldown
UI that fits every screen, notches included
How do I make the UI fit every screen size?
in the course — Camera & Input: Touch controls and joystick
Saving progress: PlayerPrefs, JSON, and when each is right
How do I save the player's progress?
in the course — Export to Mobile: Saving progress
From project to APK on a real phone
How do I build an APK and get it onto an Android phone?
in the course — Export to Mobile: Build, install, debug on device