Mao, these designs are really good. While I personally don't really like the idea of recolors, the new pet concepts and level concepts that you've posted are excellent. In the few designs that I have done I rage about halfway through because the software that I use has a finicky layer system and so sometimes I have to restart. I couldn't imagine having so many concepts while dealing with the constant bother of the program's bugs. Personally, a concept that I have always found interesting and perhaps others might agree is the idea of the pet being on the character as they move. Similar to what the squid buddy does, but with actual stats and animations. I haven't personally been able to make more designs because of some issues I've ran into with the program, but I'd be glad to give ideas to someone who is able to create more concept items. Let me know what you think and I can post more ideas here if you'd like