These vectors of Tux & Penny from SuperTux are free to use. You can use them in your project. Just go inside the project and drag them into your backpack.
https://www.supertux.org/download.html SuperTux is a free and open-source 2D side scrolling platform video game inspired by Nintendo's Super Mario Bros. series. Players control Tux, the mascot of the Linux kernel, through a variety of levels and worlds to rescue his girlfriend, Penny, from Nolok.
