Thanks for all the nice feedback! I didnt know about the chernoff faces, but after looking it up its quite similar to how I made my characters with little variables to make the characters distinguishable!
Regarding the difficulty, I've realized afterwards how easily I could've added a difficulty setting or even slider in the menu so the player themselves can decide how difficult they want the game. Now I just tried to make it manageable but never impossible for the player. There were definitely some early version of the game that were NOT this easy hahah!