I think that this engine is with bug.
Sometimes it works nice and after some minutes all the sprites is like that screenshot, bugged. I try open the program more times and everything works ok.
You may be suffering from a Schrodinbug. I am so very sorry.
No, I don't think anybody here claimed pointers were causing the bug. They are, however, extremely dangerous, and we wanted to help save you from the headaches they will cause down the road.
Again, we cannot help you further unless you create a complete and minimal code that demonstrates the bug you are experiencing.
On a purely speculative note, have you made sure your video drivers are up to date?