Ok, so here’s the deal on the problems with level loading
* There’s a bug in LWJGL that makes connecting to the host from an applet impossible.
* There’s a work-around for
that bug, and I’ve implemented it.
* Opera doesn’t support this work-around, and neither does old versions of
java.
* The bug in LWJGL is already fixed and will be included in the next version of LWJGL
So to make it work, either wait for me to update to a new version of LWJGL (which is rumored to be released “soon”), or update java and don’t play on opera.