To play Monster Rush and become the ultimate monster trainer, use the direction keys or on-screen controls to move your character through the anime-themed world. Explore different environments, encounter obstacles and avoid enemies. As you navigate, keep an eye out for Monster Balls scattered throughout the game world. Collect as many as you can to expand your collection. Build a powerful monster team by carefully choosing which monsters to include. Consider each individual's strengths, weaknesses and abilities. Customize your team to create a balanced and powerful squad. As you collect more monsters, win battles, and advance in the game, you'll unlock new areas, challenges, and opportunities to prove yourself as the ultimate monster trainer.