diff --git a/src/sk8plotlib/variables.py b/src/sk8plotlib/variables.py
index b8d4992..6e1bf90 100644
--- a/src/sk8plotlib/variables.py
+++ b/src/sk8plotlib/variables.py
@@ -1,4 +1,11 @@
-FRAMERATE = 60
-TIMESTEP = 1 / FRAMERATE
+# Game settings
+MAX_FRAMERATE = 60
+MIN_TIMESTEP = 1 / MAX_FRAMERATE
 GRAVITY = 10
-TERMINAL_VELOCITY = 150
+TERMINAL_VELOCITY = 150  # m/s
+
+# User speed settings
+# Rotation speed per frame
+USER_ROTATION_RATE = 1.5 * 3.14  # rad/s
+USER_ACCELERATION = 10.  # m/s/s
+USER_MAX_SPEED = 20.  # m/s
\ No newline at end of file