Question about Project 64 Emulator?

So, I am currently playing "The Legend of Zelda: Ocarina of Time" on my laptop on the Project 64 Emulator, but I came across a problem. In the water temple you have to shoot something with an arrow and then use the longshot to get all the way across before the timer runs out, but since I am on my lap top, it seems a bit fidgetey, so it will got either barely above or barely below the target so I can't make it there. I used to play it with an XBOX 360 controller but my USB thing broke, so I can't play it with a controller. It sucks because I am like very close to being finished with the temple but I can't because of that. I understand that Project 64 isn't made to run exactly perfect because it is free and all, but has anybody else come across the problem? Any suggestions on how to fix it? Thanks!