hmm. well splinterlands is a bit challenging if you try to climb the ranks, and then if you play tournaments too. I really enjoy the quests because then you get a reward when you finish, and it isn't that hard. There is a learning curve, but ultimately it is free, although spending a few bucks does help get further faster.
I have been hooked since playing two months ago. Anyhow, take care, and maybe I'll see you on the splinterlands battlefield.