CascadeQuest
Click here to download the zip file for Windows.
Then extract the files, and run sciv.exe.
It's a very short game (6 screens) - so far.
Nov 29 - updated the graphics.
screen shot

For Mac OSx and Linux users, you might still be able to run it by trying these out:
FreeSCI - a UNIX program that runs old Sierra SCI games.
MacFreeSCI - Mac info.
I have no idea if this works.
If you encounter a bug, or something doesn't work the way you think it should - email me!