Add a few more levels & complementary mechanics and you would have no idea this was built in 48 hours. The game is perfectly polished, looks great and sounds snappy.
The game is perfectly clear and the difficulty curve is well tuned making it super easy to pick up and just keep playing. I also like that there are clear moments of puzzle solving, where you must speed up a river early to anticipate a frog much later and more chaotic, reactionary moments.
All of this makes for a great submission!