More game modes

[weebao]

Also add a normal mode (wrong test case doesn't penalize), medium mode (wrong test case will reduce your health), and hardcore mode (you die if you get one test case wrong). Will also need to separate run and submit button (run shows input and allow you to edit it ig, test doesn't)

[weebao]

Inspired by https://www.youtube.com/watch?v=nO7J6pBEkJw btw