Completed it in just over a minute first go. Nice theme. It's a short game, but a good idea.
The camera was difficult to control, you should follow standard conventions in control schemes. Having large objects that easily obscure the player's view isn't really a good idea. I started right next to the huge boulder and it was tricky to move clear of it.
The map should have been a lot larger. This would easily have increased the play time.
There really should have been some music and ambient sounds. Sound effects are also an obvious missing element.
It's overall, a good start. There are lots of things that can be added to it.