Another *cough* original *wink* game.
This did actually have several different game modes (in a VCS sort of way), including one where your plane is invisible, except when you drop a bomb.
But overal the same basic game that even Jeff Minter has also coded when stuck for a game.
(https://retrobytesportal.gameex.com/Pics/Blitz/Title.png) (https://retrobytesportal.gameex.com/Pics/Blitz/Inst1.png)
(https://retrobytesportal.gameex.com/Pics/Blitz/Level1.png) (https://retrobytesportal.gameex.com/Pics/Blitz/Level2.png)
(https://retrobytesportal.gameex.com/Pics/Blitz/Level3.png) (https://retrobytesportal.gameex.com/Pics/Blitz/Level4.png)
(https://retrobytesportal.gameex.com/Pics/Blitz/Level5.png) (https://retrobytesportal.gameex.com/Pics/Blitz/Level6.png)
(https://retrobytesportal.gameex.com/Pics/Blitz/Level7.png) (https://retrobytesportal.gameex.com/Pics/Blitz/Level8.png)
(https://retrobytesportal.gameex.com/Pics/Blitz/Die.png) (https://retrobytesportal.gameex.com/Pics/Blitz/Pause.png)
(https://retrobytesportal.gameex.com/Pics/Blitz/Score.png)
It had a pause mode with one of them swirly display things as well - see, there was just so much more than a simple Blitz/Bomber game :)