This is a very simple example of how to use Lacewing (OINC replacement (MOO replacement)) for making simple online games and applications. It shows the basic features and usages and works quite nicely. If you don't have another person or another computer to test with, just build it and open more than one. (This can cause errors sometimes with some router/ISP setups)
Feel free to ask questions and I will answer. For general Lacewing things you should ask Jamie, since he's the one developing it.