Lives don't reset when you reach 0 and start again. Each life lost after that goes into the negative numbers
Thanks. Much better now. One other problem though... when you die and start back at the top you can sometimes start and instantly get hit by a hammer which means you lose another life before you had a chance to do anything else. When you lose a life anything near the spawn zone should disappear or change direction so that you're not trapped.
Not a problem, but a possible improvement would be to be able to shoot up or down. It would make it a little easier to destroy things.