Damage Everything

Now the fight goes both ways. Keep everything from the earlier lessons. The enemies are not tagged any more: the swing finds what it can hurt through an interface instead, and the enemies hurt the hero through the same one.

• IDamageable declares one method, void TakeDamage(int amount);.
• Enemy implements it. It gets health, damage and attackEvery, set in the Inspector (a grunt has 2, 1 and 1; the dasher 1, 2 and 1). TakeDamage takes amount off health and destroys the enemy at 0 or below. In Start, keep the hero's IDamageable as well. Every frame, when the hero is within 1.2 units, call its TakeDamage(damage), at most once every attackEvery seconds.
• Hero implements it, with swingDamage (1), maxHealth (5) and safeTime (1) set in the Inspector, and a health that starts at maxHealth in Awake. A hit takes amount off, logs the health as Hero HP: 4, and keeps the hero safe from further hits for safeTime seconds. At 0 health, log The hero falls and turn the Hero script off (enabled = false). A fallen hero ignores hits.
• The swing no longer tests tags or destroys anything: it calls TakeDamage(swingDamage) on everything in reach and in front that has an IDamageable.

Press Play and fight, then Check.