Just checked it out because I was aware there was a park in Perth which I visit a couple of times a year with mates for business - the website might use a couple of small tidy-ups. There's a lot going on here on my screen - lots of scrolling without any obvious cues to let me know how I can pause the scrolling to read the text - and some of the text is obscured by other page elements.
Specifically:
Abyss page has images full of text in the scroller - it scrolls way too fast to read them and some are cut off at the top. As they are images search engines won't find them either.
Opening hours page suggests you're closed May-August this year. Is that right, or does the calendar just not go that far yet?
On the main page there's three horizontally scrolling elements visible at once that scroll automatically at different speeds/times. Since this is the first page I hit on your website this is where I'll spend the longest to get a feel for your layout so that I can navigate. Having it constantly switching under me (and large amount of it that are content links) seemingly at random really makes me have to concentrate to be able to get where I want to go.
On the main page two of the links in the main content link zone are for merchandise and corporate bookings. Unless these are a really large part of your market you might consider swapping one or either of these out with a link to attractions. Visiting your site for the first time I was keen to see what you have in the park, but that's not an option presented to me prominently.
Oh, wait, I just saw that there's a list of rides directly underneath this zone (but it was partially off-screen at the bottom). Partially disregard the above point, unless that's something you're not looking to achieve. I like the list of rides and their names below them, however the list looks like it's meant to scroll off the right of screen (I can see part of an image of another right hanging off the right), but there's no button for me to click to see what it is - only a link above for 'more', although the 'more' is sort-of in a strange area, but I assume the 'more' relates to rides.
I've just clicked through to your rides and attractions page. I like the images, and I know I can put my mouse over the tiles to see the names, but I'd rather see the names presented to me first. Just a personal thing, probably. Also, the rides don't really seem to be in any sort of order. Thrill level order might work for me, but if you're looking for the family demographic you don't want them thinking it's an all-thrill park I suppose. I'm a little unclear - are you primarily a water park? Is the water park separate? How, as a guest, should I best manage my day as I wouldn't think you'd want me on the rides if I'm wet?
Anyhow, please don't take these as criticism, but more as observations by someone with an interest in attending your park. Free market research I suppose.