Congrats! Reaching wave 10 is not an easy task. About the comments, here's what we thought...
The lighting is not only an aesthetic choice, but it also helps to remove clutter caused by the X marks.
We decided to not use right click so you can see what the range and pattern is on the weapon that you got. If you were to right click, you'd have to guess how it works, and that doesn't make sense.
Lastly, once you start a new wave you get a message on screen saying what weapon you got, and the icon on the top changes. Also, as I just said, you can right click and check what you have before you make any move.
Hope that cleared up any doubts! And thanks for giving the game a go!