FocusShield - Block distracting websites and stay focused

I made a chrome extension (FocusShield) that can block sites, Although there were already some site blockers, but i tried adding some more features such as motivational quotes, some puzzules and also a hard-mode, if chosen, the users will have to solve some random maths problems to unlock that.. and on top of it you will only get 2 attempts to solve all of them correctly or the site is blocked for additional few hours. The idea behind blocking websites that causes distraction isn't new and many people already use free extensions for this, so yes this is also free for basic utilities but I kept additional features on paywall.