Really like the punishment mode. However, I really want to f*ck the Viperess so bad and punish her so hard like the bad girl she is. I suggest gameover scene animation is also good to punish the Viperess. Don't forget cum scenes are also really popular, and controls to cum white semen on body/face or inside. Adding sex moan voices will be very perfect, there are copyright-free ones too online. Best is to hire a voice actress in twitter but it all depends on your current situation. Also more difficulty options so barrier to entry is better and more people can enjoy it. Maybe implement some achievement system so people also can challenge themselves to play the hard mode and get satisfaction trophy after clearing it. Lastly, maybe some bonus scenes for example, make the Viperess or the characters to be even more "broken" or "pregnant"(up to you) if we punish them a lot of times for extra satisfaction. Thank you. Overall I really like the character designs, expecially the Viperess. Keep up the good work!
Sorry for the long message. These are all my feelings and suggestions.