A. Don't know if it exists and I'm just missing it but if not, perhaps there should be a future update that allows you to skip previously viewed scenes to get back into the game faster (If you fail a mission it would allow you to get back to the defending part right away instead of having to click through the dialogue again)
B. On M3: Pokyo's Limits, one suggestion I have is to make the interval between the later waves longer since it can not only become very hard to manage all the enemies but it can also cause a ton of enemies to gather on screen (If you're unable to kill them fast enough) resulting in a drop in performance of the game