As it is, once an enemy hits on player it's game over. We'd like to add lives. We can start with 3. When an enemy hits a player, the life is subtracted, but the game continues from that point. To make it a bit more challenging, we'd like to make the player indestructible for a few seconds after losing a life.

As it is, once an enemy hits on player it's game over. We'd like to add lives. We can start with 3. When an enemy hits a player, the life is subtracted, but the game continues from that point. To make it a bit more challenging, we'd like to make the player indestructible for a few seconds after losing a life.