For your first unity game it´s a really nice one!
I like the froggy-design and the sounds are good, too. Only when froggy screams at me was a time when my ears started bleeding. But else froggy is a good friend :D
The environment is nice, especially the lights that rise from the ground. And even if walking on so many hills is a little bit tricky it was still ok :D
I think it fits to the theme very, very good.
Hope you make more games, it was fun to play :)