fix type and zig snippets

site/docs/tutorials/snake/collision-detection.md

@@ -727,7 +727,7 @@ What you do, is up to you. You could stop the game and show the score. Or you co
 ```zig
     pub fn isDead(this: *@This()) bool {
         const head = this.body.get(0);
-        for (this.body.constSlice()) |part, i| {
+        for (this.body.constSlice(), 0..) |part, i| {
             if (i == 0) continue;
             if (part.equals(head)) return true;
         }

site/docs/tutorials/snake/goal.md

@@ -1,10 +1,10 @@
 # Inspiration & Goals
 
-Snake is a simple game. You can implement it in pretty any language or engine. It also allows for real-time user interaction and is a challenging game in itself.
+Snake is a simple game. You can implement it in pretty much any language or engine. It also allows for real-time user interaction and is a challenging game in itself.
 
 ## Goals
 
-And the end of the tutorial, you will have a working version of snake.  
+At the end of the tutorial, you will have a working version of the game Snake.  
 You can expand on it and make your very own version along the way.
 
 During this tutorial you will learn how to ...
@@ -25,4 +25,4 @@ You'll find all completed implementations in the various languages.
 
 At the end of this tutorial, your snake game will look like this:
 
-![Snake Preview](images/endresult.webp)
+![Snake Preview](images/endresult.webp)

site/docs/tutorials/snake/handling-user-input.md

@@ -10,7 +10,7 @@ But first, you need to understand how WASM-4 handles user input.
 
 ## Gamepad Basics
 
-WASM-4 provides 4 variables that represent the current state of the respective gamepad. It's `0` (Zero) if nothing is pressed right now. Otherwise it contains a sum of those values:
+WASM-4 provides 4 variables (one for each different Gamepad) that represent the current state of the respective gamepad. It contains a value `0` (zero) if nothing has been pressed; otherwise, it contains a sum of the directions pressed, based on the table below:
 
 | Button   | Value |
 |----------|:-----:|
@@ -421,9 +421,9 @@ impl Game {
 
 ```zig
 export fn update() void {
-    frameCount++
+    frame_count += 1;
 
-    if (frameCount % 15 == 0) {
+    if (frame_count % 15 == 0) {
         snake.update()
     }