First of all, thanks for playing! I know my game is not perfect, of course.
I knew that 3 levels only might have been a bit too few, i was focused on getting the game done and then in the end add some more levels, but didnt get aroung to do it.
The thing with the rays is understandable, although if use your ray correctly you can gain plus 1(You have to be really close to the enemies to kill more at once). But i understand that its not obvious and not well communicated.
Anyways, thanks for the feedback! maybe i should have done a little more playtesting and some of these issues may have been eliminated.