Thank you so much for playing and for leaving a comment! I'm glad that you enjoyed my passion project! And I'm glad you fell back in love with Sans. >:3 Honestly, I just wanted to share the way I see (and love) Sans with everyone else. And it makes me happy to see you had a skele-TON of fun!
To answer your question, yes! It's called "True Love." There are three routes in total: "True Love," "True LOVE (No Love)," and the "Secret Route." You'll find the Secret Route just by playing again. I won't give away any more than that. :)
Also, that hesitation you have to go back and play the geno/no love route.... it means I did my job. >:D