Space Invaders, methinks ( Ace- high card in the word Space) Overturned- Invaded.( Gap- Space) So think , it could be Space Invaders? Warm wishes, Bea :-)
Just seen Invaders is 8 letters, not 7, oops, sorry!! Though think it maybe Space,-------? Good luck fleurbird :-) Has is a medical theme being St John Ambulance? Warm wishes, Bea :-)