Scratch

what do you mean by health feature?...If you want to keep track of the "health" of a sprite in a scratch project, you can make a variable called "health" and change it by -1 whenever it touches something bad (using the touching___? block in the sensing catagory).

If you want, you can check out my Grumpy Wizard example game.  He loses health every time a witch hits him.  In the main game loop, if health ever equals 0 then the end game routine is called.