Cancro is all about traversing whole cellular structure and destroying the cancer cells leading to a healthy life.
Its a generative game where on every cell traversal new cells gets exposed. Tapping on the cells makes the capsule bounce towards the new cell and destroy it. But take care not to keep the capsule too long on the destroyed cell else you will lose you capsule :)
Also take care not to tap on the already destroyed cell :)
Enjoy the game play and have fun :)