You can also play it with the touchscreen. To use the gun, you can click on the robot and then the direction you want to shoot.
Will have a look though.
I got around this by removing the MOD setting and then just mapping the shots in different directions to the ABXY keys which is pretty comfortable, but agree just pressing A or X etc would be quite nice
Mcobit - thank you for porting this game, it's great fun - where do you kep finding all of these great games that you are porting?