Wow! Thank you a lot for playing through the game and taking your time for this nice feedback, we appreciate it very much!
Yeah about "Sir Turnalot the Brave" (the yellow guy) couldn't make it into the game. His constant rotation has given us a headaches :D But he will definitely return ;)
The reset button, yeah it was obvious and we had the functionality but forgot to bind it to the key, sorry about that and you're right about the undo button this has to be a feature.
About the "joined" state, we thought it will be clear because of the 3 and the 10 (introduction of the green guy) level but obviously we were wrong, thank you for pointing this out.
So, thanks again for your constructive feedback!!