All four are very stylish and attractive. The second one reminds me slightly of Twin Peaks (except it isn't an owl), and the first one's only visible flaw is the font spacing needs fixing (it seems to say "Everyt hing 's g rowing quiet ..."). (It's definitely the font's fault for having spacing like that. Many display/draw programs won't draw to the right of the letter, going straight into the next one, which is why it's done this way. There's several ways of circumventing this, the best one being to have kern, or negative, spacing. Second best is to use multiple layers, but they have to be placed precisely.)
The last two are nice; they don't seem to be gameovers but rather The Ends or perhaps Shutdowns? Still well-designed though.