I appreciate the comment, and it's not rude at all!
*Spoilers*
You're supposed to be able to get past Undyne by flirting, but the option is glitched and I'm troubleshooting how to fix it at the moment.
*Spoilers end*
Saving the pie for later is a good idea that I'll try to implement in the next update as well. The mistakes throughout are there because this was my first time trying to make a game and I rushed its release here faster than I should've. Thanks so much for playing!!