We talked a bit before, but to formarly reply here, thanks for playing mate!
The controls are quite awkward right now because I put all of them there for myself during development and haven't yet made a pass with a more intuitive scheme for the actual players.
The line-finishing mechanic thing is a huge decision I had to take that might make people mad but it had to be done. By allowing the player to skip lines before they're done, it would break the entire "voice" system. I mitigate the frustration by making each line very short so there's not too much text, and making each of them also medium to fast delivery, also giving players a FF option, but yeah, ending the line early won't be supported. Hopefully it's something people will get acclimatized to during normal gameplay