Wow, you've made a bunch of games for Roku. Run Cmd is lovely btw, lots of game types, I'm impressed by the parallax scrolling, and the various tape graphics are cool!
Honestly even with the games it seems there is some variation (at least in UK) possibly influenced by downloads, but visibility is obviously difficult. If it's not profitable to advertise a game, it's probably not worth doing. Unfortunately with my research I've still not seen any adverts in the games, that are supposed to be supported by adverts. I expect some of this is due a normal January downturn in advertising availability but still that doesn't bode well.
We generally make solitaire and domino games, but are currently looking at making puzzle and word games. The company is Glowing Eye Games.
I was thinking trivia games seem popular on TV boxes, but it does look like making something specifically for Roku is probably not a good business idea.
The other prolific Roku developer RomansIXIV seems to have converted their games to other formats. They're pretty good too.
It sounds like your revenues have actually gone down over time.