sometimes my games dont work if i have internet connected etc. have you ran it as only app running?
this is why i decided not to actually do a game yet. been busy building segments, packs, models, textures, traps, that way i have been productive with minimum frustration of game building problems.
i will have a go soon though after most mods and updates have been added. till then why try, as the new stuff will change things completely and you will prob all start again anyway.
an unquenchable thirst for knowledge of game creation!!!