🚀 Example Script – Player Horizontal Shooter (Space Invaders / Phoenix)

This script implements a classic controller for horizontal spaceship shooters, inspired by games like Space Invaders, Phoenix, Galaga and Galaxian. The player only moves left and right and can fire with a controlled rate of fire.

💡 Tip: This script is optimized for games where the player only moves horizontally and shoots upward. You can combine it with enemy waves or predefined patterns.

📜 Full Code

// ======================================================
// 🚀 HORIZONTAL_SPACE_PLAYER.js — Horizontal movement + shooting
// ======================================================

let speed = 120;

// ------------------------------------------------------
// 🏁 Start — initialization
// ------------------------------------------------------
function Start(obj) {
  obj.type = "player";
  obj.vx = 0;
  obj.vy = 0;
  obj.canShoot = true;     // prevents too fast continuous shooting
  obj.shootDelay = 0.25;   // minimum time between shots
  obj.shootTimer = 0;
}

// ------------------------------------------------------
// 🔄 Update — main player logic
// ------------------------------------------------------
function Update(obj, dt) {

  // ======================================================
  // 🎮 MOVEMENT — keyboard + gamepad
  // ======================================================
  obj.vx = 0;

  if (IsAnyPressed("ArrowLeft", "a", "gamepad_left", "gamepad_dpad_left")) {
    obj.vx = -speed;
  }
  if (IsAnyPressed("ArrowRight", "d", "gamepad_right", "gamepad_dpad_right")) {
    obj.vx = speed;
  }

  // apply horizontal movement
  obj.x += obj.vx * dt;

  // ======================================================
  // 🧱 LIMIT movement within camera bounds
  // ======================================================
  const viewLeft   = -offsetX;
  const viewTop    = -offsetY;
  const viewRight  = -offsetX + cameraWidth;
  const viewBottom = -offsetY + cameraHeight;

  obj.x = clamp(obj.x, viewLeft, viewRight - obj.w);
  obj.y = clamp(obj.y, viewTop, viewBottom - obj.h);

  // ======================================================
  // 🔫 SHOOTING — keyboard + gamepad
  // ======================================================
  if (obj.shootTimer > 0) obj.shootTimer -= dt;

  if (obj.shootTimer <= 0 &&
      IsAnyPressed(" ", "gamepad_a", "gamepad_button_a")) {

    CallFunction(obj, "Shoot");
    obj.shootTimer = obj.shootDelay;
  }
}

// ------------------------------------------------------
// 💥 OnTriggerEnter / OnCollisionEnter
// ------------------------------------------------------
function OnTriggerEnter(obj, other) {
  // ...
}

function OnCollisionEnter(obj, other) {
  // ...
}

// ------------------------------------------------------
// 🔫 Shooting function
// ------------------------------------------------------
function Shoot(obj) {
  // Create bullet going upward, example:
  // CreateObject("Bullet", obj.x + obj.w/2, obj.y - 10);
}

📘 Quick Description

🧠 Suggestion: combine this script with enemy wave patterns or sinusoidal movement to create a full retro shooter experience.
⚙️ Optional extension: add a shooting animation: 
PlayAnimation(obj, "Shoot");