Looks like a great game, but when I double click it it just pops in the dock for a moment then goes away. :(

Rundy is a pretty decent game...Unregistered users can play the first 10 levels as much as they'd like. There's no wait screens or things that pop-up every couple of minutes to tell you to register at all. More games should be like that.
In this game you have to move your mouse to control a ball to a specific target. It's harder than it sounds. Gravity has a huge pull on the ball.
I've been playing for about 15 minutes and made it to Level 7. One thing I found odd is that Level 3 is the hardest level so far. Another thing that isnt so great is there's nothing that explains what everything is. So if you see something while playing, for example a blue block with a symbol on it, or empty black space, you pretty much have to kill yourself to figure out you can touch it. In another level though, that same black space is an area that you have to go through to complete the level. Confusing, yes.
Anyhow, it is a damn good game, check it out.

This is an promising re-implementation of the classic Oxyd games. However, while Oxyd was hard, this game is even *less* forgiving than the older game. A couple of the levels are physically painful to play using a mouse, as well as introducing high speed narrow "catwalk" runs way too soon. You really need a trackball to play this remake without injury.