My Stupid Casual Programming Problems

[Azriel]

What is "a"?
What is "rndrbackid", and magic number "4321"?

+1 to Blue Phoenix's comment, I might expand on it. Every frame:
Remove objects that are dead (to be deleted) from the list of on screen objects
Sort remaining objects (smallest to biggest z)
Render objects.

p/s: don't make a map of object -> z position



Azriel~