I actually think it's cool you tried doing both 2D and 3D in one project. That's not the safe route, especially for a jam. The 2D levels felt the best to me; simple, clear, easy to follow. The frog is kinda charming in a barebones way. The 3D sections are definitely more experimental, but I respect the attempt.
There's something fun about just collecting pineapples and hopping around without overcomplicating it. With a bit more polish on movement and maybe some audio next time, it'd feel even better.