Mario style enemy killing

Has anyone played Mario. Then you must remember the small brown enemies that you kill by jumping on them. But if you touch them from the sides, you will die. I want to make a similar type of enemy in Construct but i am not sure how to do so?

Download the tutorial made by "deadeye".

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Here are lessons 1 - 5 of the tutorials: http://www.box.net/shared/1nls24ni8d

edit: Ok the first link are the newer tutorials. Won't see any enemies there.

Watch these^^ They are outdated but I think the enemie killing-system works fine

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Here are lessons 1 - 9 of the old outdated tutorials: http://www.box.net/shared/1zzgt8pov4

Here an example cap --> http://dl.dropbox.com/u/26932498/enemie_destroy.cap