Thanks for your feedback!
Hmm, dying shouldn’t normally affect the progression of the last puzzle room. Are you sure you properly explored the leftmost sub-room (which opens after pressing the bottom-left button)? Maybe I should make more emphasis on a mechanic that spawns new enemies, so it becomes more consistent.
I feel like green color will break the visual style. Maybe I should introduce cyan/blue as ‘ally color’ earlier on, somehow. Right now the color distinction between things is not very clear, I agree.
Voiceover overlap happens always. I haven’t implemented the system to interrupt current sound when the new one is played :P But, the first two rooms should be the only places where this is possible.
Subtitles seem important, I had them planned originally, but they weren’t fitting in a time constrain and I kinda neglected them. If I take this game further, subtitles are a must, obviously.