ok,
winUAE has lots and lots of different variables that simulate different amiga cpu's, kickstarts, workbench's, etc,etc.. Now, the thing is you have got to find out the correct settings for your particular game(flood), however, there is a web site that has downloadable configs that only need slight tweaking here and there. this web site is:
http://www.back2roots.org/Games/
All you need to do is download the config files, then type your game in the box at the top of the home page and note the config given for that game(you can also click on the config given, for example, "esc13"and it will give you the specifics for that config). If then it still does not work then you need to try different versions of WinUAE until you get it sorted..
hope that helps..
-nug-