Hello!
It's really cool and we need more good tutorial like this.
Good job!
Let me nitpick and maybe offer observation to improve them:
I would like to point that "bad Puzzle" like the one feature in the picture are still good tutorial. They are good at establishing relationship between gameplay element without a single word, but only if the designer create a barebone set up devoid of distraction.
Too often I play game with "good puzzle" but with bad tutorial and the player keep going in circle (me). Too often the designer think the solution is perfectly "obvious" but fail to understand that the player do not have a complete frame of the game when he start playing. Game are made of self containing conventions and those conventions need to be learn too, we are never sure which convention the game use and which carry on from previous work.
In your example,you assume the audience know how to play the game, it use platformer convention. But I wasn't sure that the character could jump nor the screen scroll, I wasn't sure the game if the game played as a top down vision or if it was a side scroller (especially with the small video capture of adventure of lolo). I didn't know the interaction, items can be picked but the character had no hand? I thought we had to pushed them! There was some kind of tension because by only looking I could not make those inference.
EDIT:
You should have linked your article too, a lot more in depth