Nice answer ( that is not irony ).

But imagine you would have to create a logo. Would such an answer satisfy you? No. And see, this is my situation. I have to create a logo. I was always confronted with tasks in my life that usually were too difficult to me to solve. Somehow I managed to do so. Let me have a third try. But before I begin to try again, any suggestions? ( beside a simple logo )

Um.. if you don't want to hear the answers, don't ask.
If I had to create a logo, I'd try to do some research first -as in checking logos that are well known. Then I'd try to find out why these logos are well known.
I'd then mark those that appear to me most.

Then I'd ask myself some questions, like
- what purpose should my logo have?
- do I want an imagetype with text, just text or just an image

Say you want to have a text only logo, what purpose does it have?
It should identify my company, so it should be easy to read. It should be able to symbolize my company, so it should be elegant and to the point.

If I want something fancy, I'd then create some sort of flight over the logo, assemble the logo, blend it in, etc - but at the end, there should be a simple, easy to read and to the point logo. Maybe with a voice pronouncing the name of the company - simply because I want the viewer knows the name of the company. And is able to pronounce it

Ok make the outline of the text white, black, green, SOMETHING, and the backround one color... then it will be good.

Wohow, yes, you are right spellcaster.

http://www.jray.de/Jackgames6.jpg

THIS is perf-ect

Well, at least I can now read the name. That's a big plus if you want people to know the name of your team.

I'm just not sure what "Revolution Gameplay" is supposed to mean? Do you mean "Revolutionary Gameplay"?

Anyway, if you don't want to hear the aswers, please don't ask.
Try to use a smaller font size, line them up nicely, use a typeface / spacing that allows you to lineup "revolution gameplay" on the same horizontal space as your "Jack Games" typeface, and you have a nice start.

Don't get my wrong, but even "rainbow arts" used less aggressive colors.

Thanks for your help.

That was my lesson today.

See, my problem is the following: How do I create a logo that consists of many colors/ is somewhat more complicated and simultaneously well readable? This seems to exclude each other...

Why would you want many colors? Best designs use just a few colors and those colors are not aggresive and are easy on the eyes (not red on green or deep blue on dark purple, for example).

[EDIT]
Here's what google has to say about logo design.

What will you do when your company becomes big? You will have to print your logo on business cards, CDs, t-shirts, baseball caps and the sky. How do you expect to do that with a very complex logo? To make it "portable" a logo has to work in all sizes, on all (or at least many) backgrounds and on all materials and textures. That's one argument. Simple logos are practical.

What will your logo look like printed on the spine of a CD case? or as a 16x16 icon?

What colors do you want? And why?
Colors have a meaning in most cultures, so you should use colors with a positive connotation in your desired target markets.

Colors should be used to transport a meaning. Don't use colors just because you can.

Designing a logo is much like designing a program. You'll have to think about what you want first. Then think about why you want it. And then you can start throwing ideas around.
When you have finished something compare it with your goals.

Do you have example logotypes you like? If so, please provide some links.
And please use company logos

Also, what is your goal with youor logo? What colors do you want to use? Why?
What feeling should the viewer have? Where do you want to place your logo? Splash screen of a game? Company Website? Company letters? T-Shirts?

Despite from any concrete idea, I want to transfer the message of something totally new. And I have no idea which color could express novelty.

If look at most of the companies logos, they consist of the colors white and blue. That expresses some mood of solidity. Calmness.

I want exactly the opposite. ( don't make jokes now about the solidity )