fire animation should require less ressources

Makefile

@@ -39,10 +39,10 @@ public/assets/%-ts.png: assets/%.png
 	convert $^ -scale 32x $@
 
 public/assets/fire-anim.png: $(FIRE_ANIM)
-	convert $^ -append -scale 32x $@
+	convert $^ -append $@
 
 build/fire%.png: assets/fire.png
-	convert $^ -distort ScaleRotateTranslate $(shell echo $@ | sed 's/[^0-9]*//g') $@
+	convert $^ -distort ScaleRotateTranslate $(shell echo $@ | sed 's/[^0-9]*//g') -resize 32x $@
 
 public/assets/%.json: assets/%.json
 	cp $^ $@