Nice work! I did a quick recording of my game play in case it's helpful: Clackademy by WentMaking | Cap Recording
Great simple memory game concept executed within the theme. I like the '100' on the not hermit crab as a foreshadowing of how hard of a challenge is ahead of you, I think this small touch really sets up the student/master vibes of the game. I liked the art style too, cute crab.
Personally for me in these types of games I prefer having a tone for each unique action, instead of the increasing pitch with each combo. This just helps my brain memorizing sequences, like in Simon, but everyone else's brain doesn't work like mine does 😆
A great game overall, well done.