This is an idling game that seems to have a lot more strategy than other idling games.
You will typically, unwittingly at first, pick out a character to be the DPS unit. Then you will position buffing characters around them, and other buffing characters where they fit. Then you take them through different tasks which are semi-difficult to get through. After each task, you soft reset while gaining 'idols' which grant you 3% more DPS each and 1% more gold each globally.
Each weekend/holiday they implement a themed event, which is great for peaking everyone's interest. The new events will often grant buffs that will help you to push through an area you were having difficulties on, or even have new characters you can win. The winning of new characters really gives the feeling of progression.
Each character can hold 3 pieces of equipment, and each item is a better version of the previous item. There are plans set in the future for new rules on crafting items you are having trouble finding, and even crafting those items into Legendary items which can be upgraded to infinity. https://i.redd.it/vcdok00lhosx.png
This game is a great distraction. But I have found that after I set up my formation after a reset, that I do other things and come back to this game to spend gold on my DPS character every 30 minutes or even a few hours.