OK, the rest are
Mushroom Mania (when I saw that screenshot with the Pac like circle I got the idea), the maze was from
Dedale and the and the ships were from the
Pirates of the Barbary Coast.
The review ideas are somewhat strange I guess, so I thought they wouldn't fool anybody, although the Paradropper idea is acctually taken from another game (Beach-Head II) and I guess the Pirateships could be a nice game too.
So yes, it's all from our own screenshots, except for the Title picture - that one I made myself (in an C64 emulator, to make it look more dated - and to make sure the company name can't be seen).