In the third stage of the tutorial, if you click on the skill before polly tells you to, the entire area becomes darker and you become unable to proceed. I had to reload the game.
Glitch on day 11 or 12. When level starts, money counter keeps raising but no aliens or task guide shows up. Had to reload game. When I hit continue it went back to the same screen with money counter going up but no other way to continue the level.
Thanks for letting us know, have logged the bug and looking into it. Any chance you can remember the upgrade you picked before starting the level?