Definitely needed some kind of explanation of the controls either in the game or in the description, but once I figured out it works similar to Angry Birds, it became a lot more fun than I was expecting!
I'd also like to add that the platforms don't really work too well with the physics, I'd suggest increasing the friction on the ground and adding some kind of direction indicator while the player is charging a jump.
Overall, there's a very solid foundation here that could be turned into something really impressive with a bit more time. Great work!