Musescore->Synthesia

Hello everyone,

I do a bit of piano arranging and I have this score I want to move from Musescore into Synthesia. I want to do this because I haven't quite perfected the song but I'd like to go ahead and upload it into Synthesia. I am using the free version of Synthesia currently because I am awaiting a USB/keyboard cable and I am not certain it will work on my old keyboard.

Here is the score: https://musescore.com/user/26897271/scores/6269254

Is there a way to do this with Musescore? I know it is possible because I've seen people create things that are impossible to play and upload them into Synthesia (sheet music boss on youtube), though I'm sure they must have been using an alternative program other than musescore.

I like musescore's features and functionality, though I really wish it had iPad support since arranging music consists of playing something on the piano, walking 15 feet, inputting it into the computer, forgetting, going back and forth, and it's just a hassle, but I digress...

Anyway, is there a way to take this score above and just send it straight into Synthesia? I think Synthesia uses Midi so maybe if I convert it somehow but I don't know how accurate the program is in capturing the right keys purely by an audio sample without and keyboard data.

TLDR: How do I move musescore files into Synthesia?