The in-game units are real frogs, and you've done your research on which species would make sense for which tower. That's what I love the most about this game, this kind of inspiration is something only your game has. The towers are well-designed, albeit pretty standard. I've never seen a tower defense that uses frog tongues as attacks, it's unique and the animation is well done. I think what would make this really stand out, is if you made it so the frog draws in an insect and eats it if its attack executed the insect.
I like that you made all the art for the game's units. It could have been higher quality, and there's no design to the level as of now. There's no sounds and the UI is just functional. But, this is all because you didn't have much time to make the game to begin with. I think with more time all of these shortcomings solve themselves.
I hope you'll keep working on the game. If you could think up a unique mechanic to set it apart from a regular tower defense game, and add some more gameplay and art, I would definitely want to play it again! If not that's fine as well, either way I was happy to learn some frog trivia.
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