I think it looks good.
Couple of things: 1. it's "coarse" not "course". 2. I'm a bit confused about the difference between the first screen and the Home screen - the former is a nice welcome with a pleasant scenic picture, but the latter is exactly the same but without the picture! Are you planning to develop the Home screen so there's more on it?
I think the Denomination approach works best, as it's usually particular denominations, not monarchs, that come in for fakery. E.g., George III is known most for evasion halfpennies (and contemporary forgeries), and also Northumberland shillings. The halfpennies make an interesting historical study for the reasons that underlay their forging; the shillings however are modern and intended to fool collectors. Otherwise the halfpenny and shilling fakes have absolutely nothing to do with each other. So IMO the denomination approach is not only better but more logical.