Thanks a lot! Haha yeah all sounds are me trying to throw some sounds so it doesn't feel as empty, so I had a bit of fun with that.
For level 3 the easiest way is to send the one on the bottom left to the corner and lure the ones from below to go up, while you keep the ones from above to enter as much as you can (coun an reach one barricade before collapsing. In the end you have just enough time for the one in the corner to stay.
Yeah, I commented below this that restart completely slipped my mind and would have been very easy to implement. I have some code for an undo for actions done, but decided I had to prioritize some other stuff and couldn't get to it again on time.
Yeah, for the explanations, I wanted to at least have two different ways of displaying the ranges for starters (so movement and stacking show two different colors). And didn't get the tutorials on time (which would have been a picture for each stuff, not something that complicated), so I hoped that levels were easy to repeat enough so that would be enough room for trying out stuff (which wasn't the case because many commented on the lack of tutorials / explanation of things).