At the end make like a huge boss fight that u cant avoid just like tesla but a zombie and u cant avoid it like u can avoid tesla by just not doing it but make him 100% and make him smart like he knows how to get in the train and on the brige make him op and smart so its actually hard not just go on the brige gg done :) like make it hard give him a ton hp more than tesla and if u do tesla then it will be tesla + that zombie so make it a achivement and make him with abs and stuff and huge i think this would give some hype to the finish as it was back then when we didnt know we could have just went on the bridge this makes it actually fun and gets ur heart rate a bit up and add some stuff to the forsts each 10000m they pretty empty