Hhhmmm. I've never done voice work before, but if you want to make it a more generalized American accent, I humbly suggest not putting so much emphasis on any "t" at the end of a word. This is probably just a bias from my personal experience, as I am from the extreme southern US. And as the previous review said, you should change the pronunciation of the second syllable on Jester. Most of the time when you see a word ending in -er, just pronounce it like -ur. Almost like a growl in this character archetype's case. Other than that, just try to speak avoid slowing down in the middle of a sentence if you aren't pausing for emphasis. (Not sure if the slow points were simply stumbles in the reading of your lines.) If nothing else, take solace in the fact that your American accent is far better than my English accent.

You did a really good job, by and large, passing for someone from the midwest; basically, what we North Americans consider to not be an accent at all. Which is perfect for what you're doing.

However, you do slip up on the second syllable of Jester. I'm not sure how to tell you to say it differently. Maybe try drawing it out a little more? Other than that, though, you nailed it.

Very impressive. I suck at non-Midwestern North American accents. You've got nothing to worry about.