So I pre-orderd the game and now finally it's out, I want to instal it and it says: Not compatible...
Anyone else having this problem or a solution to fix it?
Or is it just my pc that's too old and I just can't play it?

Are you saying you pre-ordered this without checking the minimum specs?

Minimum system requirements:
Windows 7 / 8 / 8.1 /10 (64bit)
Processor: Intel Celeron G1820 | AMD A4-7300
Memory: 4 GB RAM
Graphics: NVIDIA GeForce GT 730 | Radeon R7 240
Storage: 15 GB available space
Sound: DirectX compatible sound card
Other: 1280 x 720 minimum display resolution

I'm sorry that I'm not familiar with those terms.
I don't play a lot of games on my pc, I'm more a console player.
My pc isn't that old so you should think it could play that game.
But I guess was wrong than.

Can you let us know you system specs? like what OS you have your cpu gpu and ram. Then we might get an idea if it is your computer or something else. You should also try and contact gog support they might help you.

I'm interested in this game but my graphics card is a GTX 960M. Am I out of luck? Or running this on dreadful settings?

The minimum requirement is a GT 730 and your GTX 960M is newer and better. I see no reason why you should be out of luck.

@FredStubbs
Probably it tries to run the game from the integrated graphics card. You need to change it from the nvidia control panel to make the game run from the gtx960.

1. Open the "Nvidia Control Panel".
2. Select "Manage 3D Settings" under 3D Settings.
3. Click on the "Program Settings" tab and select the program you want to choose a graphics card for from the drop down list.
4. Now select "preferred graphics processor" in the drop down list. (You can see what the automatic option is listed as global setting) If you want to use the dedicated graphics card, select High-performance Nvidia processor.

If it was a hardware problem, you would still have "Play" button available, but after clicking it you would most likely get one of three outcomes:
- game would fail to launch,
- game would launch and crash,
- game would launch and run in low framerate.

I bet you have 32-bit system on your computer. This game is 64-bit and requires 64-bit OS, that's why it says "incompatible".