cute game and fun when you understand what to do.
i think the reason the main concept of the puzzles is confusing is because visually each hermit crab has the same shell , but if each hermit looked like it belonged to a shell that a different hermit was wearing it would make more sense that they all need to be wearing the correct shell for the win condition.
also a reset button would be nice for those cases when you have to wait ten seconds even though you already messed up the puzzle.
also for the tutorial text try to keep it to the bare minimum you need players to know, because people typically ignore giant text blocks.
great work!