Hi there, I recently made a Simple Calculator all by myself and I’m really proud. Besides the obvious calculator, there are color themes! Themes change up the color of everything! Currently, there are 3 themes, Regular, Cotton Candy, and Forest with 2 more being added very soon!
Now this calculator is really basic and seems to be just a few return(x+y) or (x/y) etc, maybe you should add more complicated concepts such as square roots, cubed roots, exponents, irrational numbers, etc.
i recommend adding parts to this game like graphing calculators, scientific calculators, even converters. you could also just make separate games holding all separate things.