Game, decent. Too bad you can't un-evolve to change up your strategy when you are low on cash. And definitely, without a doubt, needs a mute music button. As every game should have, so don't feel like you are being picked on.
At the main menu, option has a spot to explain and change the keys. That said, there does not seem to to be an a way to return to the main menu or change options during the game.
4/5 - adding a save is mandatory. Making the interface auto-swap commands when you drag an existing one over another existing one would be great. Having an indicator light illuminate each command as the robot runs thru the program would be super. Could even make it toggle-able for those who may say it would make things too easy. An excellent intro to programming, it's a graphically glorified version of Turtle Graphics.