Noodle on normal mode is messed up. Row 6/7 both have 1 1 1 combinations, but no corresponding Column works for it, as all are greyed out. I believe the correct answers are supposed to be in Column 10 as the GUI gives weird answers there.
Excellent work, sir! I'm impressed by this game, it completely fills a nitch in my heart. Being able to autoselect new targets after the old one dies is very intelligent and is missing out of most games. I've been playing almost since you released it, and the updates you've made to the game are sensible and only add value. If you continue doing this, and wish to work for a gaming company, this game will be a great testimonial.