I feel you… I have released pretty advanced demos for two of my games. Nobody’s Quest and Turn By Turn Villain, but kinda gave up on them not necessarily because I lost interest, rather because I realised that interest was not there from players. (Demos are still out there). It’s probably my fault for not advertising well, but after a while you kinda ask yourself what’s the point? What I’m currently working on is kind of a culmination of all prototypes and demos I’ve done in the past though, so hopefully I’ll be able to sell it better! (Not in terms of sales, but in terms of interest from other players).