What do you think of this?

New feature for Open Space where every day at a random time, notications sent to user: do you want to battle a villain in 1 hour and then with 2 minutes to go.

all users are shown on screen. they can shoot at the villain and move their ship. villain shoots back. may destroy your ship. u take an escape pod to nearest planet, choose new ship.

villain  health depends on users combined health. it should get harder if it is defeated or easier if last time not defeated.

villain drops some important rare item when destroyed