Not bad for a start i highly suggest using paper doll as it would save you from so much peering job which i assume you will do eventually considering there are 20+gifs in just f/m vaginal folder,many real porn games just puts few random gifs and handles it cheaply. i like where this is going but i am afraid your intention to keep size small wont last long cuz there are still lot of thing you will add to game new positions,threesomes etc.sure with crunch compression you can reduce the size greatly but with cost of quality and uploading two different versions of game would take so much of your time and internet.
Well i will keep on eye on your game regardless