There is now a demo for The Sea Will Claim Everything. I still think the best way to find out whether you like the Lands of Dream games is to play The Fabulous Screech, but I understand that some people would prefer to be able to see what a game is like before they spend money on it. So here you go!
The download is fairly big and should give you quite a bit to look at – but it actually only contains a tiny fraction of this rather big game (actually it’s a portal, but let’s keep it simple). If you buy the game you will have to download a bigger file, but your saves will be kept.