Commands:
/playtime [<player>]: Check a players playtime
/modifyplaytime [<player>] [<time>] [<amount>]: Set a players playtime to a given amount. (Example: /modifyplaytime DERETU hours 10)
/resetplaytimeitem: Gives the reset playtime item.

(Default) Permissions:
Permissions can be changed in the options of the skript!
Checking playtime: sbplaytime.check
Modifying playtime: sbplaytime.modify
Giving reset playtime item: sbplaytime.admin