Thanks for playing and the feedback! For a game like mine, figuring out the best control scheme was a tough one. I would have liked to use mouse for shooting (left and right click,) but since you need to move as well both unit colors separately, both hands needed keyboard. I did map it for controllers since I thought joystick and bumpers could be more intuitive for some players.
For level 8, if you look at the top, there is a mirror corridor that gets filled with bullets. At the end of it, there is a bullet button that triggers the death lasers. I thought players would look at the top of the screen and see bullets go through, but maybe it wasn't clear enough that it was a race against the clock.
The button level being trial and error was meant to be a puzzle room, so yes, it is intentional :)
Again, thanks for the feedback and glad you liked my entry! I did give feedback on yours too