1). Move Kingda Ka from SFGAdv. If it stays at SFGAdv. , it will have more problems than TTD. And KK fits nicely with MarineLand's themeing for every ride of theirs.
2). Add an Inverted Coaster. An Intamin Twisted-Impulse coaster like Wicked Twister can fit nicely into this park. Doesn't take up a lot of space too, so I give the green light for an Intamin Twisted-Impulse. Or if the park can't buy a twisted-impulse coaster, a B&M Invert will do nice. Both B&M and Intamin Inverts don't have maximum height restrictions, so green light for an invert. Don't build a Vecoma SLC.
3). Add a frisbee ride like Psyclone at PCW. Huss or Mondial, it will do good.
4). Add a hyper coaster. But don't have Intamin build it. Build a hyper coaster like Goliath at SFMM. The Intamin hypers, like Superman Ride Of Steel, had to have its' restraint system modified more than once because of the 1999 accident at SFDL, and the 2004 Accident at SFNE. I don't know anything about MF's restraint system being modified more than once.
5). Build some sort of transportation around the park. A monorail or a mini-railway will do a good job transporting guests from the front gates to Dragon Mountain. And also offer at least a chairlift to go to the top of the Sky Screamer mountain. Some people just can't climb a 150 foot mountain.
6). Add a B&M Stand-Up Roller Coaster like Riddler's Revenge or Mantis.
7). And always keep your ride queue lines short.
Dragon Mountain and Sky Screamer are the only reasons I go to MarineLand, so to the MarineLand management, my ideas will bring more guests to the park.
Playing RCT does not give you the neccesary skills to manage a park.