I certainly hope it's doing alright. I admit I'm one of the spring sale newcomers that sort of bought it on a "yolo", but I'm glad I did. I know that since I picked it up dirt cheap, it isn't exactly showering the revenue upon you and I'm sorry for that, but so far I've quite enjoyed both of them (they're surprisingly different games) and will be checking out Shattered Haven and any of your other games.
I realize the Valley's aren't for everyone. I feel like many people don't seem to *get* what its all about, but I think the platforming/strategy of Valley 2 has massive potential, and I enjoyed the bits of humor in the writing.
So while I hope they and future releases do well for you, even if they don't, you can take pride in having done something unique. Pride may not pay the bills, but I can respect developers gutsy enough to try to forge new paths in gaming.
Best of luck.