diff --git a/movement sim/config.yaml b/movement sim/config.yaml
index 1370f92..68246a9 100644
--- a/movement sim/config.yaml	
+++ b/movement sim/config.yaml	
@@ -17,6 +17,7 @@ Holding:
 # X axis
 on_ground: false
 holding: false
+retained: true  # whether to use retained speed if present
 # Y axis
 jump_timer: 0  # 11 if just jumped, 14 if wallbounced. jump speed will be based on current speed
 auto_jump: false  # forced half peak gravity, from dashes, springs, etc.
diff --git a/movement sim/sim.py b/movement sim/sim.py
index c3ac7aa..b6a3af1 100644
--- a/movement sim/sim.py	
+++ b/movement sim/sim.py	
@@ -44,6 +44,7 @@ def __init__(self):
         self.on_ground: bool = bool(cfg_dict['on_ground'])
         self.ram_check: bool = bool(cfg_dict['ram_check'])
         self.append_keys: str = str(cfg_dict['append_keys'])
+        self.retained: bool = bool(cfg_dict['retained'])
 
         if self.axis not in ('x', 'y'):
             print("Axis must be x or y, exiting")
@@ -72,11 +73,12 @@ def __init__(self):
         self.jump_timer = max(int(init_state[init_state.index('JumpTimer:') + 1]) - 1, 0) if 'JumpTimer:' in cfg_dict['init_state'] else self.jump_timer
         self.holding = 'Holding: Celeste.Holdable' in init_state if 'Holding:' in init_state else self.holding
 
-        for i in range(len(init_state)):
-            if init_state[i].startswith('Retained('):
-                self.speed_init = float(init_state[i + 1])
-                print(f"Assuming retained speed ({self.speed_init:.3f}) applies next frame")
-                break
+        if self.axis == 'x' and self.retained:
+            for i in range(len(init_state)):
+                if init_state[i].startswith('Retained('):
+                    self.speed_init = float(init_state[i + 1])
+                    print(f"Assuming retained speed ({self.speed_init:.3f}) applies next frame")
+                    break
 
 
 def main():