O thank you very much, I'm pretty sure the measurements of the base are 3" deep by 5" long leaving a fair amount of room in my tank though being slightly but not too crowded. Would it be possible to use co2 and have the bubbles come out of where the air bubles are supposed to go or would you not have enough bubbles?
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That being my tank with the front being curved maybe put the ferris wheel in the back left corner like that at an angle like said, then a diagonal path to it with some sort of pebbles or something with smaller plants on the sides of the path and surrounding the ferris wheel and taller plants in the back left corner to hid heater and filter. What small bushy and grassy plants could I use. I haven't seen java moss for sale though maybe if I ask nicely a petstore will sell me some of theres in a display tank

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Don't mind the a's that's just to fill the space so it stays like that, it's the dotted lines to worry about hope you can understand it.