Basically, we have three main things here:
1. We have Bosses - this all goes to DPS. The boss and his horde come, and you have a set amount of time to kill them. If you didn't kill them, you can try later.
2. You can't upgrade all the Wizards (your friends) for one run. You have to choose one of two friends per room.
3. Prestige. Classics of incremental games. You have to restart the game with new features after you earn prestige points.
We're still developing some of this right now. But all of these features will be ready soon. Bosses are coming this week, for example