i feel each world should have Something special.The fact it's always the same isn't bad but some little twerk could make it so each of them is unique. it could be by adding a cosmetic element or a gameplay element. After, it's not the most important feature to had but would be cool.
i cna't understand the lvl 25, maybe because i'm not native English talker bt the hints ( 4 buttons in 4 directions) and "North East West ... doesn't help me at all. I tried all 16 possibilities and it doesn"t work, im' lost :/
 "Realm Grinder"){kind=icon}
 "Immortal Hero Idle"){kind=icon}
 "What's inside the box?"){kind=icon}
 "Swarm Simulator"){kind=icon}