I didn't change the shades of grass in 0.1.4 (edit: you probably mean the background grass I added?), already said I won't add music because I can't make music, that's why I added wind in the background, checkpoints just added in 0.1.5 and I'm not using any free/paid downloaded assets, I made everything myself. And also the framerate issue probably was random and got fixed with a new build and there's an official Linux build now :)