This is an easy to use Game Designer system.
It supports various types of games, all of which
can be built with "drag-an-drop".
To start, click on [Make a Game] at the top.
Answer a couple questions.
Then drag and drop objects into your game.
Finally, press the PLAY button [>] at the bottom right.
It's just for fun (and to learn something).
You do not need to turn in this work.
If you don't like Sploder, maybe you can find
something better on this page:
http://www.pearltrees.com/ardentseeker/make-ur-own-game/id1310761
But do try Sploder first - it really is very good.