What I have to say is that this game is simply incredible! It perfectly captures the style of Undertale. I don't know if this character actually exists in the game, if it's a background NPC, or if it's his original creation, but I love this idea. I would like you to make more content like this, with several NPCs, until you reach around 15 of these guys. So, I could even create an entire game combining all these minigames, perhaps with multiple endings depending on the number of characters we have interacted with, where it would be a kind of harem.
What I like most is that you're not just resorting to the more well-known characters like Toriel, Undyne or Dr. Alphys. Instead, you're highlighting secondary female characters, NPCs who usually go unnoticed or original. There's so little about them that it's almost sad. This approach brings something new and refreshing, and I love it!
Keep up the great work! I hope more minigames like this style come in the future.
Thanks for reading : )
P.S.: Just out of curiosity, how long did it take you to produce this game?