Fix snake speed and add runtime tick speed controls

README.md

@@ -30,6 +30,8 @@ s / ↓ | move down
 d / → | move right
 f11 | fullscreen (graphical UI only)
 l | toggle tick speed limit
++ / = | increase speed (faster snake)
+- / _ | decrease speed (slower snake)
 r | restart
 q | quit
 

src/config/config.py

@@ -25,7 +25,10 @@ def __init__(self):
 
         # tick speed
         self.limitTickSpeed = True
-        self.tickSpeed = 0.1
+        self.tickSpeed = 0.2
+        self.minTickSpeed = 0.05
+        self.maxTickSpeed = 1.0
+        self.tickSpeedStep = 0.05
 
         # misc
         self.debug = False

src/ophidian.py

@@ -244,6 +244,24 @@ def removeEntityFromLocation(self, entity: Entity):
     def removeEntity(self, entity: Entity):
         self.removeEntityFromLocation(entity)
 
+    def increaseSnakeSpeed(self):
+        """Decrease tick speed to make snake faster"""
+        self.config.tickSpeed = max(
+            self.config.minTickSpeed,
+            self.config.tickSpeed - self.config.tickSpeedStep
+        )
+
+    def decreaseSnakeSpeed(self):
+        """Increase tick speed to make snake slower"""
+        self.config.tickSpeed = min(
+            self.config.maxTickSpeed,
+            self.config.tickSpeed + self.config.tickSpeedStep
+        )
+
+    def toggleTickSpeedLimit(self):
+        """Toggle tick speed limiting on/off"""
+        self.config.limitTickSpeed = not self.config.limitTickSpeed
+
     def handleKeyDownEvent(self, key):
         # For text UI, key is a character; for pygame, it's a key code
         if self.config.useTextUI:
@@ -281,6 +299,12 @@ def handleKeyDownEvent(self, key):
             elif key == 'r':
                 self.checkForLevelProgressAndReinitialize()
                 return "restart"
+            elif key == 'l':
+                self.toggleTickSpeedLimit()
+            elif key == '+' or key == '=':
+                self.increaseSnakeSpeed()
+            elif key == '-' or key == '_':
+                self.decreaseSnakeSpeed()
         else:
             # Pygame key handling
             if key == self.pygame.K_q:
@@ -320,13 +344,14 @@ def handleKeyDownEvent(self, key):
                     self.config.fullscreen = True
                 self.initializeGameDisplay()
             elif key == self.pygame.K_l:
-                if self.config.limitTickSpeed:
-                    self.config.limitTickSpeed = False
-                else:
-                    self.config.limitTickSpeed = True
+                self.toggleTickSpeedLimit()
             elif key == self.pygame.K_r:
                 self.checkForLevelProgressAndReinitialize()
                 return "restart"
+            elif key == self.pygame.K_PLUS or key == self.pygame.K_EQUALS:
+                self.increaseSnakeSpeed()
+            elif key == self.pygame.K_MINUS or key == self.pygame.K_UNDERSCORE:
+                self.decreaseSnakeSpeed()
 
     def getRandomDirection(self, grid: Grid, location: Location):
         direction = random.randrange(0, 4)