Game is closing right after start. What componnent is needed to tun this (s)hit?

Please remove the sound "Ush" when you jump!! Possibility to save would be nice!

At start, you don't have to go thru that "Up-Down" SpikeFence, you can go around the corner and JumpJumpJump by the wall... :) Actually you can just go to the Cliff next to you and JumpJumpJump...

Is there a difference, if I shoot them from faraway or close?

The installation process of the game doesn't download any data. Checking local installation/files from the games properties doesn't change anything about it. I'm running Linux by the way. But SteamDB says there's a couple of Gigabytes of content for Linux. So what's going wrong? Is it my client or is the game not correctly configured on Steam for Linux users?...