Renamed pause.lua to ui.lua; adjusted accordingly.

data/scripts/entities/particle.lua

@@ -13,8 +13,9 @@ Particle = Entity:New(x,y)
   o.sprite_scale = particle_data.sprite_scale or o.sprite_scale
   o.sprite_tint = particle_data.sprite_tint or o.sprite_tint
   o.sprite_alpha = particle_data.sprite_alpha or o.sprite_alpha
-  o.sprite_flip = particle_data.sprite_flip or o.sprite_flip
+  o.sprite_alpha_base = o.sprite_alpha
 
+  o.sprite_flip = particle_data.sprite_flip or o.sprite_flip
   o.animation_active = particle_data.animation_active or false
 
   o.time = 0.5
@@ -63,7 +64,7 @@ end
 function Particle:HandleAnimation()
   self.body:Animate()
   self.timer = self.timer + current_dt
-  self.sprite_alpha = (self.time-self.timer)/self.time
+  self.sprite_alpha = self.sprite_alpha_base*(self.time-self.timer)/self.time
   if self.light ~= nil then
     self.light.range = self.lightRange * self.sprite_alpha/2
   end

data/scripts/entities/player.lua

@@ -129,6 +129,7 @@ function Player:DoPhysics()
     local particle_data = {
       animation = self.body,
       sprite_tint = HEX2RGB("#fed100"),
+      sprite_alpha = 0.5,
       sprite_flip = {
         x = self.sprite_flip.x,
         y = self.sprite_flip.y