Healthhii is an application for your PC which allows you to replace the health and safety warning with a picture of your choice. This is only compatible with 3.2U and 3.2E currently. Also, you need to have a Windows PC.
Or when your player dies, you can say in code, if enemy exists, do nothing, but if enemy does not exist, then create enemy at certain spot. (This would be a pain tho for lots of emeies)