you are right... and is most probably because of too many parallel process events in the game. I will have to organize them before giving a new version.
EDIT: New version uploaded... lag prevented and has much smoother gameplay. When test playing, close all other programs to fully test the engines potentials.
I have tested this on a computer that does not have a video card and it works very ok. Now I am 101% sure that it will even work smoother on computers that have video cards.
http://www.mediafire.com/?omqh5xjcxzo