Anticolliders are bouncing everywhere and must be eliminated. You can send a Collider to destroy it by tapping the slider button or drag and release to launch at an angle.
Seems easy, right? But wait! Anticolliders are looking out for your Colliders and will do their best to avoid them. Their evasiveness increases at each level. If you launch your Collider and it hits an Anticollider too soon, your Collider will vanish. If an Anticollider is too evasive, you can use your Stealth Colliders to approach undetected. But use them wisely as they are a limited resource that must be earned.