First of all, thank you!
I literally JUST uploaded an update that makes the "win" state a lot more obvious. The screen shakes and it flashes (if you have your system settings set such that flashes are ok.)
I do like your idea of putting a black border around the game in this state... I'll have to try that out.
I'll add your wishlist items onto my list of future ideas for it. I like the idea of challenging your previous time.
Glad you're enjoying it! Have fun! :D