So I'm not sure if this counts as a game, but here is what you have to do:
Pick a ride from each UK Merlin park, and retheme it!
You must tell a name, and a back story.
You can keep the ride's original name if you want.
Here goes: Thorpe Park: Rumba Rapids
New name: Rumba Rapids
I would retheme Rumba Rapids to fit in a bit more with Nemesis Inferno. Add lots more water effects, and more wave machines throughout the ride. As for the indoor bit, I'd slow it down in there, have orange lights shining on the waterfall, and on the right have a volcano, that also has orange lights on it, and sprays water and mist everywhere, so the orange lights would make it look like lava. Then make it so you go near the waterfall :/. After that, a wave machine speeds you up, before entering into more water effects, and eventually returning to the station. Also give the ride a general clean-up. As for the theme music, have the normal music be interrupted by rumbling near the end of the song (to simulate a volcano), followed by some high-tension music, before eventually a grander, more triumphant version of the normal tune.
Alton Towers: The Flume
New Name: Sharkbait Splashdown (I can't think of anything)
I would retheme The Flume to fit in with Mutiny Bay. Get rid of the bath tubs - replace them with boats similar to Pirate Falls. Change the ducks to treasure or something. That's it, really.
CWOA: Tomb Blaster
New Name: Vengeance: The Story of Rameses
So I've mentioned this in the past, but I think Tomb Blaster should reflect why Rameses wants Revenge. I don't know what I would change as I've no clue why Rameses wants revenge, maybe I'll get round to that another day?
LLW: Viking River Splash
New Name: Safari Rapids
So a lot of you may disagree with this one, but Viking is really starting to fall apart recently and it needs a refurb - why not retheme it? Have lots of LEGO animals - all of which spray water, and for the finale, have some monkeys tip the bucket over - and have it actually work this time.