like the hearts in terraria, (if you've ever played or seen terraria you will know what im talking about...) but that would be only if its not too difficult. One last thing, if i were to make an enemy sprite, (could be some random sprite) that if i touch him he damages me, how would i do that, and could i give the enemy ph too so if i (wont happen for a while but...)make a weapon i can kill him,