Does it make a big difference whether you have an Intel i5 or i7?

To play Minecraft, Fortnite, Slime Rancher…

Installed in the PC

No.

The CPU generation and the clock rate per core are more important. The more current and higher clocked, the better.

No. Not very large.

What generation? Makes a huge difference if you have an i5 3330 and an i7 10700K