When I am playing a level, it will lock up and not respond for 3 or 4 seconds. Sometimes during that time, the icons in the toolbar will disappear. This usually occurs when I click the man or when I click a space for the ball to be pushed to. Sometimes during this delay, the cursor will change to an hourglass and then change back to normal where it will let me continue. At times it will say at the top "Sokoban [Not responding]".
I have noticed also that sometimes when I click the ball and then click the space for the ball to be pushed into, nothing happens for about 3 or 4 seconds and then it will go ahead and move.
This strange behavior will occur several times a minute.
I do not know if this is related, but I notice the man refreshing immediately after completing a move. When this happens, there is no delay in playing the level. This does not happen on every move but once out of every 3 or 4 moves. It seems to happen more often after a long move.
I have tried uninstalling the program and reinstalling, but it has made no difference.
Any help to fix this will be appreciated.
EDIT: I am running Windows XP PRO.