not sure if its me, but I can't seem to get 3 stars on 156. great game nonetheless!
Thank you, I'm really glad you liked it!
Level 156 is tricky to beat fairly. You can get 3 stars if you add 1 magenta to the mix.
But, to be honest, I wouldn't have guessed it on my own without computer's aid. I'll look for a good way to address this later. Thanks for reporting!