I found it a bit difficult to tell when exactly the bomb was going to blow up and so I found it difficult to tell when to shield myself. Maybe something like the bomb flashing or the music speeding up would be a good clue. The game premise is fine however I am not sure how expandab le it would be into a full game. Perhaps if it was multiplayer with friends it would be funny for a few rounds.
Its a solid protoype for a mechanic, well done