FetRisk:
http://www.x2d.org/java/4k/FetRisk4k.jar
Webstart: http://www.x2d.org/java/4k/fetrisk.jnlp

Fifteen:
http://www.x2d.org/java/4k/Fifteen4k.jar
Webstart: http://www.x2d.org/java/4k/fifteen.jnlp

Two additional entries. Main class for fetrisk is "FetRisk4k", and "Fifteen" for fifteen... "Clickrisk" for clickrisk (also posting this in java-gaming.org forums).
Descriptions:

CLICKRISK:
The goal is not to let any ball out of the round area.
Prevent them from leaving the area by clicking them, and
thereby changing there direction (to the opposite of the
clicked part). Score increases with time. There is no way
to win; the goal is entirely score-based.

FETRISK:
Get five pieces of matching color next to each other to make
them disappear. The goal is to get as many points as possible
before the blocks reach the top of the screen.

FIFTEEN:
Place the first piece in the leftmost top corner, and the
second one right of it. (In other words, arrange the pieces
from 1-15).

//Måns Olson & Åke Rosén

EDIT: Oh, yes, it seems a good idea to include the Clickrisk link, since the description is here. Here goes:
http://www.x2d.org/java/4k/Clickrisk2.jar
Webstart: http://www.x2d.org/java/4k/clickrisk.jnlp

(Also posting in official thread)

Yes... I could work a bit with Fifteen, it's sort of simple at the moment... Only 3,3 kb without optimization. The ideas for fetrisk are quite good, but it's just under the limit as it is... I'm sure I could shrink it a bit, but not very much... Thanks a lot for the ideas though, might try doing something with them.

Ooh, and jojoh: There ARE levels in fetrisk...

The level increase when you've removed a certain number of blocks. The speed increases for every level. The score you get for removing blocks is calculated based on how many blocks you remove at the same time. So a good strategy is to make sure you remove as many blocks as possible at every time.

Give me webstart Always get people going.

Kev

There's no need for sarcasm, I mostly threw that one in
It's FetRisk and Clickrisk I'm curious about... working on webstart now, should be up soon, although the certificate increases the jar size by 2 kb:s or something... that doesn't count towards the limit, I hope?

EDIT: Webstart up for all three games, see links above. Thanks for the suggestion, kevglass.

Thanks a lot.
Let's see...
I've been thinking about Clickrisk improvements, mostly such as the ones you mentioned... It was originally supposed to be a game with loads and loads of configuration options (I mean loads), but when I heard of the 4k contest, I made a simpler version for the contest... perhaps a bit too simple?
The blocks in fetrisk were originally pictures, but I had to replace them in order to fit it under 4k. Perhaps I should've worked more with the texture, though, shouldn't be too hard to shrink the code down a bit so that it can be done.
When it comes to Fifteen, you're absolutely right - I guess I didn't put enough work into the game I might do that - colours, timer, possible boardchoice... and the issue of clicked vs pressed - well, I usually used pressed, just did a mistake this time
Again, thanks a lot.

//Morre

Changed version from 1.4.2+ to 1.4+, will that work? Or do I have to use 1.3+?

Yes, it is... might do a non-fullscreen version of it.