You can now kill enemies, but they can't kill you.

main.go

@@ -44,7 +44,7 @@ type Game struct {
   status string
   width int
   height int
-  enemies map[Position]Enemy
+  enemies map[Position]*Enemy
 }
 
 func (game *Game) DrawStatus(msg string) {
@@ -135,10 +135,42 @@ func (game *Game) Occupied(x int, y int) bool {
       is_player
 }
 
+func (game *Game) Death() {
+  is_dead := make([]Position, 0, len(game.enemies))
+
+  for pos, enemy := range game.enemies {
+    if enemy.hp < 0 {
+      is_dead = append(is_dead, pos)
+    }
+  }
+
+  for _, pos := range is_dead {
+    delete(game.enemies, pos)
+  }
+}
+
+func (game *Game) Attack(target Position) {
+  enemy, hit_enemy := game.enemies[target]
+
+  if hit_enemy {
+    damage := rand.Int() % 10
+    enemy.hp -= damage
+    if damage == 0 {
+      game.Status("YOU MISSED!")
+    } else if enemy.hp > 0 {
+      game.Status(fmt.Sprintf("HIT %d damage", damage))
+    } else {
+      game.Status("ENEMY DEAD!")
+    }
+  }
+}
+
 func (game *Game) MovePlayer(x_delta int, y_delta int) {
-  if !game.Occupied(game.player.x + x_delta, game.player.y + y_delta) {
+  target := Position{game.player.x + x_delta, game.player.y + y_delta}
-    game.player.x += x_delta
+  if game.Occupied(target.x, target.y) {
-    game.player.y += y_delta
+    game.Attack(target)
+  } else {
+    game.player = target
   }
 }
 
@@ -185,7 +217,7 @@ func MakeGame(width int, height int) (*Game) {
 
   game.width = width
   game.height = height
-  game.enemies = make(map[Position]Enemy)
+  game.enemies = make(map[Position]*Enemy)
 
   game.level = make(Map, height, height)
   game.paths = make(Paths, height, height)
@@ -464,7 +496,7 @@ func (game *Game) MakeMap() []Position {
 func (game *Game) PlaceEnemies(places []Position) {
   for _, pos := range places {
     if rand.Int() % 2 == 0 {
-      game.enemies[pos] = Enemy{10}
+      game.enemies[pos] = &Enemy{10}
     }
   }
 }
@@ -480,6 +512,7 @@ func main() {
   game.Render()
 
   for game.HandleEvents() {
+    game.Death()
     game.PathEnemies()
     game.EnemyMovement()
     game.Render()