Math Graph

Yes, easy even for me. BUT excellent design and clever original concept. Thank you for sharing.

Even though the level is easy, the concept is very intuitive. I had a delightful time passing the level .

...
unique concept,
cutely executed.

I like the way you put
cartesius graph.
feels like literal math study.

plus,
you add detail neat explaination in comment.
surely required extra effort for that.