Ok, so, most of the flash games on this site are failing to work on school computers. So I'm going to find some more that do work for you to play! Jewel Quest is a classic – you're supposed to make all items gold by deleting the jewels on them within the limited time.
Drop a comment and let everyone know your high score!
You want to get 3 similar jewels to align, then they're deleted. To get them to align you need to click two jewels beside each other, and they'll swap places.