Hey! Thanks for the interest, I might add such an option later on :)
I know, D10 adds up to... 9 - afaik that's the standard of the popular Chessex dice. Tbh I'm not sure whether to "fix" that or not, perhaps I should do some sort of a community poll.
I've just added a D2 die in 0.2.0 update - there are some template shapes, and you are able to use a custom one as well :)