chore: fixup

Signed-off-by: moul <94029+moul@users.noreply.github.com>

examples/gno.land/r/demo/tamagotchi/tamagotchi.gno

@@ -17,17 +17,20 @@ type Tamagotchi struct {
 	age         uint
 	maxAge      uint
 	sleepy      uint
+	created     time.Time
 	lastUpdated time.Time
 }
 
 func New(name string) *Tamagotchi {
+	now := time.Now()
 	return &Tamagotchi{
 		name:        name,
 		hunger:      50,
 		happiness:   50,
 		health:      50,
 		maxAge:      100,
-		lastUpdated: time.Now(),
+		lastUpdated: now,
+		created:     now,
 	}
 }
 
@@ -64,6 +67,11 @@ func (t *Tamagotchi) Sleepy() uint {
 // Feed method for Tamagotchi
 func (t *Tamagotchi) Feed() {
 	t.update()
+
+	if t.health == 0 { // dead
+		return
+	}
+
 	t.hunger -= 10
 	if t.hunger < 0 {
 		t.hunger = 0
@@ -73,6 +81,11 @@ func (t *Tamagotchi) Feed() {
 // Play method for Tamagotchi
 func (t *Tamagotchi) Play() {
 	t.update()
+
+	if t.health == 0 { // dead
+		return
+	}
+
 	t.happiness += 10
 	if t.happiness > 100 {
 		t.happiness = 100
@@ -82,6 +95,11 @@ func (t *Tamagotchi) Play() {
 // Heal method for Tamagotchi
 func (t *Tamagotchi) Heal() {
 	t.update()
+
+	if t.health == 0 { // dead
+		return
+	}
+
 	t.health += 10
 	if t.health > 100 {
 		t.health = 100
@@ -96,30 +114,34 @@ func (t *Tamagotchi) update() {
 	}
 
 	duration := now.Sub(t.lastUpdated)
+	elapsedMins := uint(duration.Minutes())
 
-	t.hunger += uint(duration.Minutes())
+	t.hunger += elapsedMins
 	if t.hunger > 100 {
 		t.hunger = 100
 	}
 
-	t.happiness -= uint(duration.Minutes())
-	if t.happiness < 0 {
+	if t.happiness-elapsedMins > 0 {
+		t.happiness -= elapsedMins
+	} else {
 		t.happiness = 0
 	}
 
-	t.health -= uint(duration.Minutes())
-	if t.health < 0 {
-		t.health = 0
+	if t.health-elapsedMins > 0 {
+		t.health -= elapsedMins
+	} else {
+		t.health = 0 // dead
 	}
 
-	t.sleepy += uint(duration.Minutes())
+	t.sleepy += elapsedMins
 	if t.sleepy > 100 {
 		t.sleepy = 100
 	}
 
-	t.age += uint(duration.Hours())
+	// age is hours since created
+	t.age = uint(now.Sub(t.created).Hours())
 	if t.age > t.maxAge {
-		t.health = 0
+		t.health = 0 // dead
 	}
 	t.lastUpdated = now
 }