diff --git a/main.go b/main.go
index 79d7796..51178e2 100644
--- a/main.go
+++ b/main.go
@@ -73,12 +73,14 @@ type emitter struct {
     particleAmount int
 }
 
-
 var city *scene
 
 func update_emitters() {
-    for _, e := range city.emitters {
-        e.update()
+    for i, e := range city.emitters {
+        if remainingParticles := e.update(); remainingParticles == 0 {
+            city.emitters[i] = city.emitters[len(city.emitters)-1]
+            city.emitters = city.emitters[:len(city.emitters)-1]
+        }
     }
 }
 
@@ -97,7 +99,7 @@ func newEmitter(pos rl.Vector3, particleAmount int) *emitter {
         direction = rl.Vector3Normalize(direction)
         direction = rl.Vector3Scale(direction, 0.3 + rand.Float32()/3)
         particle := particle{
-            lifetime: rl.GetTime() + 1,
+            lifetime: rl.GetTime() + 2,
             speed: direction,
             pos: pos,
         }
@@ -107,20 +109,34 @@ func newEmitter(pos rl.Vector3, particleAmount int) *emitter {
     return &emitter
 }
 
-func (e *emitter) update() {
+func (e *emitter) update() int {
     gravity := rl.NewVector3(0, -0.02, 0)
-    for _, particle := range e.particles {
-        if rl.GetTime() > particle.lifetime {
-            continue
+
+    remainingParticles := 0
+
+    rl.BeginBlendMode(rl.BlendAdditive)
+    {
+        for _, particle := range e.particles {
+            if rl.GetTime() > particle.lifetime {
+                continue
+            }
+
+            particle.speed = rl.Vector3Add(particle.speed, gravity)
+            newPos := rl.Vector3Add(particle.pos, particle.speed)
+            if newPos.Y <= 0 {
+                particle.pos.Y = 0
+            } else {
+                particle.pos = newPos
+            }
+
+            rl.DrawCubeV(particle.pos, rl.NewVector3(.1, .1, .1), rl.Yellow)
+
+            remainingParticles += 1
         }
-        particle.pos = rl.Vector3Add(particle.pos, particle.speed)
-        particle.speed = rl.Vector3Add(particle.speed, gravity)
-        rl.BeginBlendMode(rl.BlendAdditive)
-        {
-            rl.DrawSphere(particle.pos, 0.2, rl.Red)
-        }
-        rl.EndBlendMode()
     }
+    rl.EndBlendMode()
+
+    return remainingParticles
 }
 
 // retona true caso projétil precise ser destruido
@@ -130,12 +146,11 @@ func (p *projectile) isHit() bool {
     p.pos = rl.Vector3Add(p.pos, p.speed)
 
     if p.pos.Y < 0 {
-        city.emitters = append(city.emitters, newEmitter(p.pos, 100))
+        city.emitters = append(city.emitters, newEmitter(p.pos, 500))
         for _, building := range city.buildings {
             if dist := rl.Vector3Distance(p.pos, building.pos); dist < 10 {
                 building.causeDamage(3)
             }
-            
         }
         return true
     }
@@ -256,7 +271,7 @@ func (hb *healthBar) update() {
 
 func newHealthBar(buildings []*building) *healthBar {
     return &healthBar{
-        life: 3 * len(buildings),
+        life: buildingsHealth * len(buildings),
     }
 }
 
@@ -266,7 +281,7 @@ func (b *building) causeDamage(damage int) {
     }
     b.animate = shakeBuilding(b)
     b.life -= damage
-    fmt.Println("damage:", damage, "life:", b.life)
+    // fmt.Println("damage:", damage, "life:", b.life)
 }
 
 func newBuilding(x, z float32) *building {