Thank you for your comments!
By recharging do you mean the mechanic introduced in the last two levels? I agree that could have been explored a bit more, but I didn't want the game to be too long (in the game jam context) because then people might get tired and not finish it.
And by "explicitly tutorializing basic puzzle mechanics" what do you mean? The fact that there are some levels that are very simple introductions to mechanics, or the fact that the characters talk about the puzzle mechanics, or something else? If you mean the former, I am a big fan of little "intro" levels to new mechanics so you can learn them without a text explanation.
Now excuse me, I'm off to play another block-pushing puzzle where the objects count down every time you push them :)