Finally beat Stage 4 after slacking off...

I finally beat Stage 4, but why is it so tough... It's surprisingly difficult... After beating Stage 1, the 2x speed function comes out from Stage 2, so bear with it even if it's boring... From Stage 2, pets and equipment functions are unlocked every time you clear a stage. The equipment functions differ by color, so choose according to your preference. Pets are just auto-equipped...? They don't have much function other than attacking together, and their grade needs to be increased. When buying pets, if you collect 85 green gems, there's a 10-pull option, so don't use blue stars for that. Use blue stars for equipment boxes! It was tough even after using the 2x damage boost (Awakening) twice to clear Stage 4... Gold Up resets every time you clear a stage, so the upgrade cost is fixed. It's recommended to upgrade after Awakening when you can add about one more arm? Even with increased damage, if you attack one by one, you'll get hit hard when the mobs come in large numbers. Also, the number of enemies you need to defeat to spawn a boss increases with each stage... Stage 1 had 1000 mobs, but by Stage 4, you need to defeat almost 1500-1600 to spawn one. This is indicated by the gauge bar at the top, so yeah...