I don't know what exactly causes the white-out glitch... but apparently looking at the menu after some odd combination of variables causes the glitch, as it was after I did that (after looking at numerous other variables) that I caused the glitch. I tried replicating the act by viewing the menu alone at the start, but that didn't seem to do it. Still, might want to take a look at the menu code and make sure it functions properly.
I know it doesn't result from refreshing (or Flash crashing) when you're outside Vana, during a fight, or when you're on the map, nor does it result from Aura joining your party (well, that variable alone). I don't have much patience to beta-test this further, but I figured I may as well state what I did test.
I do not claim to be a professional beta tester, just somebody with an analytical mindset who knows the scientific method.
Anyways, the game is definitely playable besides the loading glitch (loading DOES work most of the time, as my testing has shown!) although it's also a bit too slow-paced at the beginning. My solution to the slow pace and the grinding needed to level up is to increase Jash's, Tyson's, and Amara's level 1 stats to what they would be at level 6, then decrease the starting level to level 1, keeping everything else the same. Essentially, start them out with the stats they should have at Level 1! I'd do something similar for Aura (but of course have him be a few levels above the kids to start out).
I'd play it more if I knew how to avoid that loading glitch, or if said glitch was fixed.