I'm getting to the "rain level", but after that, there seem to be graphical glitches (can't see my characters, and the boxes are all black and sometimes disappear).
If it helps, got this in Firefox's Error Console:
Error: Permission denied to access property 'toString'
Followed by:
Warning: Error in parsing value for 'image-rendering'. Declaration dropped.
Source File: http://www.krisjet.com/littlebigmansion/
Line: 0
The server seems to be overloaded, lots of HTTP requests for graphical resources (PNG files) fail. Check the Javascript console for errors. If loading resources has failed, the game is rendered with incomplete graphics.