Needs a bit more work
Obviously there's the control problem with jumping, but what you've got here is a reasonably good if plain Icy Tower clone.
It just needs a few additions to make it more enjoyable:
1. Sound effects and music
2. Animation of the player, even just flipping the player object
3. Preloader and title screens
4. In-game instructions. People don't always look outside the frame when playing a game, for some reason.
Aside from that, not bad.