diff --git a/engine/particle_sys.c b/engine/particle_sys.c
index 8afd690..acc7da4 100644
--- a/engine/particle_sys.c
+++ b/engine/particle_sys.c
@@ -163,7 +163,7 @@ void update_particle_system(ParticleSystem_t* system, float delta_time)
 
         if (emitter->emitter_update_func != NULL && emitter->active)
         {
-            emitter->active = emitter->emitter_update_func(emitter);
+            emitter->active = emitter->emitter_update_func(emitter, delta_time);
         }
 
         for (uint32_t i = 0; i < emitter->n_particles; ++i)
@@ -175,7 +175,7 @@ void update_particle_system(ParticleSystem_t* system, float delta_time)
             {
                 if (emitter->update_func != NULL)
                 {
-                    emitter->update_func(emitter->particles + i, emitter->user_data);
+                    emitter->update_func(emitter->particles + i, emitter->user_data, delta_time);
                 }
 
             }
diff --git a/engine/particle_sys.h b/engine/particle_sys.h
index 0ca20ba..beab1a0 100644
--- a/engine/particle_sys.h
+++ b/engine/particle_sys.h
@@ -29,8 +29,8 @@ typedef struct Particle
 
 typedef struct ParticleEmitter ParticleEmitter_t;
 
-typedef void (*particle_update_func_t)(Particle_t* part, void* user_data);
-typedef bool (*emitter_check_func_t)(const ParticleEmitter_t* emitter);
+typedef void (*particle_update_func_t)(Particle_t* part, void* user_data, float delta_time);
+typedef bool (*emitter_check_func_t)(const ParticleEmitter_t* emitter, float delta_time);
 
 typedef struct EmitterConfig
 {
diff --git a/particle_test.c b/particle_test.c
index 7eb4eb5..97a6993 100644
--- a/particle_test.c
+++ b/particle_test.c
@@ -6,9 +6,9 @@
 #include "constants.h"
 static const Vector2 GRAVITY = {0, GRAV_ACCEL};
 
-void simple_particle_system_update(Particle_t* part, void* user_data)
+void simple_particle_system_update(Particle_t* part, void* user_data, float delta_time)
 {
-    float delta_time = *(float*)user_data; // TODO: Will need to think about delta time handling
+    (void)user_data;
     part->rotation += part->angular_vel;
 
     part->velocity =
@@ -44,7 +44,7 @@ void simple_particle_system_update(Particle_t* part, void* user_data)
     }
 }
 
-static bool check_mouse_click(const ParticleEmitter_t* emitter)
+static bool check_mouse_click(const ParticleEmitter_t* emitter, float delta_time)
 {
     return IsMouseButtonDown(MOUSE_RIGHT_BUTTON);
 }
@@ -108,7 +108,7 @@ int main(void)
         .update_func = &simple_particle_system_update,
         .emitter_update_func = &check_mouse_click,
         .spr = (tex.width == 0) ? NULL : &spr,
-        .user_data = &delta_time,
+        .user_data = NULL,
     };
 
     bool key_press = false;
diff --git a/scenes/game_systems.c b/scenes/game_systems.c
index 2c2c5b1..13a3664 100644
--- a/scenes/game_systems.c
+++ b/scenes/game_systems.c
@@ -6,9 +6,9 @@
 #include "constants.h"
 #include <stdio.h>
 
-void simple_particle_system_update(Particle_t* part, void* user_data);
-void floating_particle_system_update(Particle_t* part, void* user_data);
-bool check_in_water(const ParticleEmitter_t* emitter);
+void simple_particle_system_update(Particle_t* part, void* user_data, float delta_time);
+void floating_particle_system_update(Particle_t* part, void* user_data, float delta_time);
+bool check_in_water(const ParticleEmitter_t* emitter, float delta_time);
 
 static const Vector2 GRAVITY = {0, GRAV_ACCEL};
 static const Vector2 UPTHRUST = {0, -GRAV_ACCEL * 1.1};
@@ -2158,19 +2158,20 @@ static inline bool is_point_in_water(Vector2 pos, TileGrid_t tilemap)
     );
 }
 
-bool check_in_water(const ParticleEmitter_t* emitter)
+bool check_in_water(const ParticleEmitter_t* emitter, float delta_time)
 {
+    (void)delta_time;
+
     LevelScene_t* scene = (LevelScene_t*)emitter->user_data;
     TileGrid_t tilemap = scene->data.tilemap;
     return is_point_in_water(emitter->position, tilemap);
 }
 
-void simple_particle_system_update(Particle_t* part, void* user_data)
+void simple_particle_system_update(Particle_t* part, void* user_data, float delta_time)
 {
     LevelScene_t* scene = (LevelScene_t*)user_data;
     TileGrid_t tilemap = scene->data.tilemap;
 
-    float delta_time = scene->scene.delta_time;
     part->velocity =
         Vector2Add(
             part->velocity,
@@ -2208,12 +2209,11 @@ void simple_particle_system_update(Particle_t* part, void* user_data)
     }
 }
 
-void simple_float_particle_system_update(Particle_t* part, void* user_data)
+void simple_float_particle_system_update(Particle_t* part, void* user_data, float delta_time)
 {
     LevelScene_t* scene = (LevelScene_t*)user_data;
     TileGrid_t tilemap = scene->data.tilemap;
 
-    float delta_time = scene->scene.delta_time;
     part->position = Vector2Add(
         part->position,
         Vector2Scale(part->velocity, delta_time)
@@ -2236,9 +2236,9 @@ void simple_float_particle_system_update(Particle_t* part, void* user_data)
     }
 }
 
-void floating_particle_system_update(Particle_t* part, void* user_data)
+void floating_particle_system_update(Particle_t* part, void* user_data, float delta_time)
 {
-    simple_float_particle_system_update(part, user_data);
+    simple_float_particle_system_update(part, user_data, delta_time);
 
     LevelScene_t* scene = (LevelScene_t*)user_data;
     TileGrid_t tilemap = scene->data.tilemap;