Hey @colt! Looks like you’re new, welcome to the forums! Be sure to read the rules and FAQ, and always remember to #searchbeforeyoupost.
Seems like Hdanger handled this pretty well, but I’ll drop some useful guides here for you.
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Some of these lost their images, but you can still understand them well enough
How to Make an "Educational" and "Fun" Mode + How to Make an Energy System (Difficulty: 1/10 🟩)
How to create an energy to move system
Move using energy tutorial | Difficulty: 🟩 (2/10)
Everything About energy | Difficulty 🟨
🛠 Beginner Tutorial 2(Difficulty 1/5)
How to make a stamina system, Difficulty: (🟩)