The Wonderland Board

I've searched for answers to this level but I must be the only one who is unable to see what has to be done.

How can you get the coins at the top with the UFO firing at you. It has to be the reflectors that you have to use... or is it!

Help please

You have to kill that UFO with reflecting fireballs across the void.
BTW, I think it's a number 1 in nomination "stupid wonderland levels".

Thanks Muzozavr.
I did it thanks to you. I'm sorry to say that I often can't see things that are staring me straight in the face but it's nice to know that there's always someone to give me some hints.