It would help if I could see the game itself. Did you remember to tell the enemies to kill themselves when off screen? If not, that could be the issue.
Open Office? You mean the "Draw" program? I honestly wouldn't know. I do all mine via Paint.NET and it imports almost instantly. Are you converting to .PNG first? That might help.
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It would help if I could see the game itself. Did you remember to tell the enemies to kill themselves when off screen? If not, that could be the issue.