Something a bit odd happened: On stage 5 I was at the chest right before the door and had to use the key on it (because there were only 3 yellows on the board and I needed 4). Immediately afterwards, the characters started walking towards one of the high level enemies elsewhere on the map. I don't know how this happened but I don't think it was an accidental click. Because of that I had to run away. Quite annoying.
This game has some addictive qualities, but a little bit of thought and you realise that these actually relate to the WORST part of any fully fledged MMORPG you'll ever play: the notorious grind. Just build and build and build, repeat, repeat, repeat. It's levelling for the sake of levelling, there's not much else to it.
Despite this, the game is quite well executed so it gets a 3/5.
For all you tards complaining about the right/left arrows. It should stay the way it is, because clockwise and anti-clockwise are the only way to keep the directions consistent since the board is rotatable.
After the green cannon, a green snake comes from the bottom right of the screen, easy to dodge.
Then after that you have the crushers on either side along with cannons both above AND below you.