Use your mouse or the arrow keys to turn your shield. Always have the shield pointing towards the enemy. If the enemy hits your player, you lose a life. The enemy gets faster every once in a while.
6/13/2018 OMG!!! This morning I woke up and my message count was at 186!!! Credit to @okapicoder for curating this. Post your score in the comments. (My highscore is 182) Sadly you need to restart the project, if you want to play again.