Love the game, especially the equal effort to the non-standard H-Monster Girls like the goblin/centaur. Also love your dedication to no NTR. Your pay what you want w/ no minimum is also great. I paid $0 the first time I dl'ed but but paid $12 for v0.05 because it's just that good.
Whatever you do, don't make make the elf a big titty for no reason. You can always do that with a pregnancy. Same for any other pettanko.