Thank you Sunny! I'm glad you liked it.
I'm hoping for an update to the game engine that can lock up the mouse completely and prevent it from butting up against the edges of the game window. As soon as that happens, I'll be rushing out a new version. Mouse issues are amplified if you play in Safari (possibly also other browsers) but seem to be not too bad in chrome and the desktop versions - of course, hardware might also make a difference.
Good observation about the win screen. I will see what I can do for that. I like your suggestions.