Hi, again! I have a two questions for you, Luis (or anyone who can help). 1. What is VSYNC and how does it work? 2. I noticed in the part of the code (in Luis's prg) where it says how far a sprite moves it has" Y=PY+Y*2+J." What does the J do? 3. How does SPHIT work? Thanks so much! I appreciate all the help!