Connect! Animal Puzzle

This is a simple yet challenging puzzle game where you have to connect all the animals to make them disappear.
At first glance, it may look like there is nothing to erase, but when you tap the UFO, it flips upside down! The erasable animals will appear.

There are 40 stages in total!
The latter half of the game is quite difficult, so you may be surprised how few people can clear all of them...?

Animals appearing in the game are dogs, tigers, pigs, tori, and dolphins.
All the stages are free, so please enjoy them in your spare time.