Macbook Pro semi-frozen
After a while, I've noticed that all shortcuts work in Finder. Here are my steps, how I fixed the problem:


Try to launch finder, by killing rest of the apps via  "force quit apps" menu (Command+Alt+Esc)
Go to utilities folder (Shift+Command+U)
Use arrows to select Terminal
Open terminal (Command+Down Arrow)
Issue command sudo shutdhown -r now. I decided to use -r flag to reboot my mac, in case power button is dead and I won't be able to load it.


Now everything works fine. It was just a software bug.