Really funny flash. I specially like the voices. However, I think some things can be improved. For example, take care of the drawing: lineart and colouring. Try the lines to be smooth. And concerning the colouring, try not to get out of the lines.
I recommend viewing this tutorial that gives a quick overview of buttons. [link] In case you still can't do it, here is a more detailed tutorial on how to make dating sims, which includes how to make buttons. I learned how to use buttons using this tutorial~ [link]