I posted an early version of this game about a year ago. It only had a couple levels back then and the graphics were pretty simple. My brother re-released his book that the game is (very) loosely based on so we decided to re-release the game. We updated the graphics and brought it up to 5 levels. Other than that it's really a pretty simple game. You guide the Professors time machine back in time and bonk dinosaurs while picking up coins. It's goofy, simple fun. There's a time bonus and bonuses for picking up all the coins and whacking all the dinosaurs.
It's about 70% Brackeen's code from his book Developing Games in Java. I added some for extra lives, scoring and a few other simple bits. We probably won't do much more with this game because we've already started work on the next game based on the second MADS book - Live from Atlantis. That game is much more customized. We shrunk the tile size down to 32x32 pixel (from 64x64) and may even go further. We are replacing the midi music with wav, aiff and it will not be as linear. You can have multiple doors going to multiple levels and even come back to a level. I hope to have a preview posted in about a month.
But back to the game at hand. There is a webstart version and a single, downloadable jar version. I haven't tested much on Windows and Linux so will be happy to hear feedback regarding those platforms.
The url is www.themisadventuresofmads.com/madsapp/sampleGame.jsp
There's a feedback email link on the page.
Here's a screen shot