Penny's game is in the works and it's coming along nicely. We should see a first release in early May. I'm so glad to hear you enjoyed Avalon!
I do have two other very short practice stories I did early on in my VN career. They're only about 15 minutes long each but they've got some fun moments. One is called The Time Collector and the other is Myrabelle. They unfortunately don't have any sexual content though. Links below if you'd like to play them.
Myrabelle - Mega - PC
https://mega.nz/#!rn42UKiJ!Jb1IkNVwNzWFE2G1zy3Y5i-cCU7_Za0Z6_D9SogGfNo
The Time Collector - Mega - PC
https://mega.nz/#!L24UnQpI!x1PayiDcSIoLskOih2um-D5VgHhTA54I7CA3By_tjFg