“Fix and improve the existing web game code. The game currently crashes when starting Level 2 with an error like: “”Cannot set properties of null (setting ‘textContent’)””. — REQUIREMENTS FOR FIX: 1. DOM SAFETY (VERY IMPORTANT) * Make sure all DOM elements exist before updating them * Always check: if (element) { element.textContent = … } * Wrap all JavaScript inside: document.addEventListener(“”DOMContentLoaded””, () => { … }); — 2. LEVEL TRANSITIONS * Ensure that when switching to Level 2 and Level 3: * The HTML for the new level is fully rendered BEFORE updating it * No code tries to access elements that are not yet created — 3. FIX MATH PROBLEM FORMAT (IMPORTANT) * Do NOT use “”?”” symbol in JavaScript logic * Replace “”?”” with “”__”” (blank placeholder) ONLY for display Example: Display: “”__ × 5 = 25″” Correct answer stored separately as a number — 4. PROBLEM DATA STRUCTURE * Each math problem must be an object like: { question: “”__ × 5 = 25″”, answer: 5 } * NEVER try to evaluate the question as code — 5. UNIQUE QUESTIONS * Ensure both teams always receive different problems * Generate separate arrays for each team — 6. ERROR PREVENTION * Add console logs for debugging: console.log(“”Level 2 loaded””); * Prevent crashes if something is missing — 7. KEEP ALL ORIGINAL FEATURES: * Split screen (Martians vs Earthlings) * Space cleanup animation * Combo system with “”Super Laser”” * Score tracking * 3 levels structure — 8. LANGUAGE: * Keep the interface in Bulgarian — GOAL: The game must run smoothly without crashing when moving to Level 2 or Level 3. “