Lives decreasing too fast

[Alex_8BitSkull]

Basically almost exactly this:

Enemy not stopping

Ok, so you have some collision handling code in on_message() right? So what you want to do is to set a flag when you collide with the player, something like: function on_message(self, message_id, message, sender) if message_id == hash("collision_response") then -- check if collision was with the player (make sure its collision group is set to "player"!) if message.other_group == hash("player") then -- set flag self.player_collision = true …

When the collision starts, send the damage message and set a flag to prevent further messages being sent. When the collision ends, unset the flag.