A remake of the Hypixel server, the (currently) biggest Minecraft server. The plugin might not include small details such as Mystery Boxes, although it does encompass most minigames (such as Bedwars, Duels, etc.).
Give the hiders 3-5 blocks. Some time they are placed, they pop and go back to the placer's inventory. Could be an interesting mechanic to give the hider more time to evade the seekers.