Thanks so much for your support, and I hope you enjoy the games. Feel free to write a review or let me know what you think here,
I agree that voice acting would be awesome to add as an additional production value. I'd like to eventually try it with the first game since there is relatively less dialog compared to 2 and 3. In addition to whatever voice actors charge, there's also the administrative costs of sorting all the spoken lines by character, editing the recordings sent by the actors, and adding each line into the game, which is a big time sink. So if the series keeps getting more interest then hopefully it will make sense in the future to invest in that.
The 3rd game has a tiny tiny bit of voice acting BTW.