refine gameplay

src/main.zig

@@ -21,7 +21,8 @@ pub fn main() !void {
 
     const tickInterval: f32 = 0.5;
     const fastTickInterval: f32 = tickInterval / 3.0;
-    var tickTimer: f32 = 0;
+    var timer: f32 = 0;
+    var isFast = false;
 
     const fontSize = 50;
     const gameOverText = "Game Over!";
@@ -31,7 +32,7 @@ pub fn main() !void {
 
     while (!rl.windowShouldClose()) {
         const deltaTime = rl.getFrameTime();
-        tickTimer += deltaTime;
+        timer += deltaTime;
 
         if (rl.isKeyPressed(.up)) {
             game.setDirection(g.Direction.up);
@@ -45,10 +46,17 @@ pub fn main() !void {
         if (rl.isKeyPressed(.left)) {
             game.setDirection(g.Direction.left);
         }
-
-        const currentInterval = if (rl.isKeyDown(.s)) fastTickInterval else tickInterval;
-        if (tickTimer >= currentInterval) {
-            tickTimer -= currentInterval;
+        if (rl.isKeyDown(.s)) {
+            if (!isFast) {
+                isFast = true;
+                timer = 0;
+            }
+        } else {
+            isFast = false;
+        }
+        const interval = if (isFast) fastTickInterval else tickInterval;
+        if (timer >= interval) {
+            timer -= interval;
             try game.tick();
         }