Fun little game. It gets quite frustrating, but the thing with the simple mechanic is, that the player can only blame himself for not reacting in time. I also really like the sound design, since it gives hits a nice weight, especially in combination with the "ragdoll" animation.
It fits the theme only vaguely by the story given in the game's description, but I get not wanting to mess around with complex mechanics while learning the engine.
Overall a good game. Great job!