Splash Screen Showing for a second

When I package my game, it is fairly large so it takes a bit to open. I click the program, and my computer will sit for 15-20 seconds looking like it’s doing nothing, then it flashes the splash screen for a split second, then my level loads. To me it seems like the splash screen should pop up pretty soon after I click the program, then sit until the full program actually loads. Is there any way to prolong the amount of time the splash shows for? Right now it is kind of pointless, because it flashes so quickly.