Algodoo

So basically in this event each contestant needs to defeat the other contestants as boxes. Everyone starts with 30 health, but you can get past that.

So here's what happens after a few seconds:
10 Seconds: The starter automatically opens, but they can't attack yet
15 Seconds: The game starts, contestants can hurt each other now, and the healing orb also appears, healing 5 damage points.
30 Seconds: The healing orb now only provides 2 health instead of 5
40 Seconds: Falling now damages contestants
60 Seconds: Deathmatch, the platforms (except for the center one) and the healing orb now disappears