This is actually such an incredibly designed puzzle game that fits the theme in such a unique way! I like that you kept it simple by only implementing the two other elemental lizards, as it leaves the game at just the right difficulty for a real thinker of a puzzle. I swear, all of you puzzle making geniuses game out of the woodworks for this jam theme, and I am just drowning in these spectacular gameplay experiences.
For the record, I hit level 5 before I got stuck, so if there's any more content, I'd love to hear about it! Maybe you could even add other lizard elements in later, harder levels that do different things! Like a darkness lizard that teleports you somewhere specific when you step on darkness traps!
Also, the hidden sam on every level was very cute ;p The only thing I would change is maybe highlighting the egg nest a little more. It took me a while on the tutorial to figure out why I wasn't progressing when laying my egg in the cave. Turns out, it was actually the little brown nest I needed to lay my egg in to continue my elemental lizard family!
This game definitely gets an incredibly high rating from me -- it's no surprise that all the puzzle making developers are wise to what makes a game enjoyable, you smart lot! I hope you continue to create games in the future, as I'd be super excited to see what you come up with! Spectacular work! <3