It's alright! Okay concept, and it's fun to mess around with for a few minutes. However, while I'm all for simplified graphics, some shading and texturing would do wonders for this game. Especially in levels like #9 and #11, navigating that complex geometry can be difficult without a way to distinguish between objects. It would also help with theming: if it weren't for the game telling me so, I would have no idea I was playing as a newt/frog.
I think this game would benefit from a 3rd person perspective. Especially as the frog/flying frog, it can be difficult to figure out exactly where you'll land. There is a reason 1st person platformers are so rare.
The final three levels are far too easy. The game design doesn't really put all of your abilities to the test. Especially if you're going to be giving your player every ability in the game, you have to make sure they'll need them.