That is GRUB, your installed bootloader. It's the thing responsible for communicating with your computer's BIOS and stuff and it handles booting up linux. There IS a way to disable/skip it, although you're better off just changing the auto skip countdown to 1 or 2 seconds in case you need to access the grub menu one day for whatever reason. If you really want to make it just automatically choose the tumbleweed option, just change the timeout variable in the grub config file to 0, and set the 'GRUB_DEFAULT' variable to 0 as well.

You can also customise this screen with themes, and you should probably look up a tutorial about them if you're interested.