Leo can sometimes have a jolt of energy from its slapstick sequences or its bright color palette, in which Leo the lizard flies through the air, floats on a bubble, or meets other talking animals. But it's all defined by its assembly line animation, in which the spell of watching life-like characters and settings can be easily broken by looking at the backgrounds of shots for just a few seconds.

Nick Allen

RogerEbert.com

From references to Lin-Manuel Miranda (Moana) to songs that don’t rhyme and even metalinguistic performances – the one with the clocks is especially good because it completely underscores a particular character’s personality – Leo shows a surprising level of maturity that we’ve only come to expect from Pixar and Studio Ghibli films.

Brightly animated and with moments of surprising insight, there’s a warm likability to Leo that radiates, for those still in the classroom and those who left it long ago.

Benjamin Lee

The Guardian