It appears Big Micro-transactions... I mean Big Games has released a new game called PETS GO! Played it for around 2 hours 30 minutes and I can say that... its just Sols RNG but Pet Simified... or in other words its Pet Simulator if you JUST had the egg hatching part.

https://m.primal.net/LTQs.png 
Alt: A gameplay screenshot taken of PETS GO! It has a similar user interface design to that of previous BIG GAME installments (particularly their then latest installment to the Pet Simulator series Pet Simulator X.)