if you want a reference, you might want to check out "gex", a former bipede-lizard in a video game that had impressive animation (though not pixel art)
your art is cute, though your animations are imho too fast. Also, you opted for a "standing straight" pose. Imho, you'd reinforce the "lizard" effect by having his body showing more like an "S", with the head in the following of the spine, and the spine bending so that he's still standing with the head horizontal.