Three aspects I like in this animation: funny, cartoonish & simple. Also, I like how the hole in the slime represents how we have a "hole" in our heart when we meet someone we love & only they could "fill" up the "hole".

One thing I don't like in this one is that in 0:08, the slime hits the second tree, even though the perspective makes it look like the first tree is in the way(the slime moves to the right & the 2nd tree is on the left of the first tree). Good job though, Hayder!