Found a secret: Press F1 while playing to understand better his engine. (not so secret since its written on screen, I need new glasses, woops.)
Sadly it runs a little slow here, strangely audio and animations runs smoothly as butter, but Julius and enemies move slow and some other bugs happens because of that (Holy Cross should make him float a little, but in my case it touches the sky, I can only see his legs after he reaches the maximum point lol)