I can't play your game right now :p, but I could probably give some tips for a controls tutorial.
1: Make your game simple. Simple games often have simple controls, and as such, will make it easy to play.
2. Force the level design to teach it. By that I mean there may be a tall cliff that can only be gotten over via double jumping, which teaches the player that "Hey, bud, you can double jump"
3. Add an in-game tutorial. By that I mean force the player to go through a tutorial in-game which has some speech bubbles saying what you can do and why you would use it. For example, Cuphead, a game I hope you would have heard about, has a tutorial like this.
That's all I can think of really.
Hope this helps somehow!