Well Trak, I think the biggest fault was when you put defender in the game, because 9/10 people are automatically going to assume its a tower-defence, since everyones still making those. That might've been why a lot of them are being kind of... idiotic I guess thats the word i'd use, about it. Because they just click it assuming that its going to be a tower defence, so they automatically hit play then any of the settings, and wonder what they're playing and then get upset about it. Also, 9/10 people dont read the directions to most games.
I forgot to right a few suggestions, maybe after a few seconds, instead of just the folders flying around have different objects come in? I think that'd be more interesting. Also, to Steffen, you're defending the mouse from being hit, as you're moving it around, thus you're defending it. But overall, I think it could just use different things flying around at set intervals, instead of all of them flying around at the beginning, it'd give the game a more appealing look, well thats my suggestion.