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The Teleporter in Ice Man's just gives a black screen, you can't progress past it. You can still swap weapons and pause, and the Ice Man music keeps going, but that's it.

I want to play this game, but I feel really bad about downloading the game without being able to support the developers...

When you try to run it, click "More Info." After that, a button on the bottom should say "Run Anyway." Or something to that effect. Click that.