This is the first project I do in any new language I learn.

You start the game having 50 hitpoints and 3 potions. Your opponent is a mindless, ancient evil who has 100 hitpoints. You each take turns, with you moving first.

On your move, you can do one of two things:

• Attack the enemy, causing him to lose 10 hitpoints.
• Expend a potion, causing you to gain 30 hitpoints, up to a maximum of 50.

After your turn, your opponent attacks. (This happens even if the opponent was "killed" in your turn.) Your opponent's attack causes you to lose 10 hitpoints.

The game ends when either your hitpoints or your opponent's reaches 0. If you have hitpoints at the end and your opponent doesn't, you win! If you don't have hitpoints at the end, you lose, even if your opponent also has none.

When implementing this, your result is not "correct" unless the following are true:

• Using a potion when you have 20 or more hitpoints should leave you with 40 hitpoints at the beginning of your next turn, since your opponent attacks you after your turn.
• If you kill your opponent and your opponent kills you in the same round, you lose.
• Attempting to use a potion when you have none should not use up your turn. (It should also not succeed.)
• Strange user input should not use up a turn either. (If relevant, this should trigger a short "help" blurb.)