Nintendo - Putting Play First

One of my favorite video essay's on this is "Nintendo - Putting Play First" by Game Makers Toolkit [1]. It goes into when making a game, Nintendo first determines the mechanic they want to focus on; jumping, throwing a hat, shooting paint, etc and finding out how to make it fun, then building and iterating on the idea. It's how they can keep putting out essentially the same games but are completely different. 1. ▶ this video

There's a Game Maker's Toolkit video [1] that does a good job explaining how Nintendo focuses on play first. "That's how we make games at Nintendo, though: we get the fundamentals solid first, then do as much with that core concept as our time and ambition will allow" - Shigeru Miyamoto 1. ▶ this video

I highly recommend Mark Brown's video "Nintendo: Putting Play First, ▶ this video (and his other essays on Nintendo)

Quick suggestions on usability, maybe start off the game with players on a slower speed so they get used to moving around first and then gradually speed up by accomplishing actions that you want them to do in a training sort of manner so that players start learning and don't get confused. Side note: I subscribe to Mark Brown's Game Maker's Toolkit on Game Design and Game progression, here is an example: ▶ this video I think it would definitely help