Like all clicker games the goal of Tap Adventure is to start out clicking on bad guys long enough to buy a hero to attack and collect gold for you. From that point on you are min maxing your way to collect more gold and experience to hit level 100 so you can "Time Travel" back to the start of the game keeping some of your previous progress in treasure chest keys and some magic stones that act as a form on in game currency or you can optionally choose to continue on to achieve ever crazier gold collection heights. The art style, music and interface of Tap Adventure is quite good which helps when you basically live in the same clicker UI for your game duration. So far in Tap Adventure i've Time Traveled once and found the second iteration through the grind cycle to be easier as I have an understanding when to save gold for the next big upgrade VS saving to buy a new hero.
Tap Adventure: Time Travel is available for free on iPhone, Android, Steam, PC and Mac. If you are looking for a new clicker game to play that isn't too hard and has some fun moments, you might want to check it out.