I Have made many gmod addons, my most popular gmod addon is a w.i.p parkour mod called beatrun! beatrun is only for people who pay for my patreron (i have been making ths mod since 2021, i have no plans on releasing it) and it has a mirrors edge style gameplay. i dont want to add music. there is no "levels" the community makes them and you download them (its still gmod after all) https://datae.org/beatrun/