You can set the timer for yourself (Recommendation: 30 secs) You basically just need to move your mouse or finger on the screen and try to collect the shoes (rubbish) as fast as you can or you will lose. For PC, you can click to sprint. For mobile, you're always sprinting :/ (This is my version of a school project btw)
Everything by @BlackCat2560 (I am an alt, you should know that by now) There are two versions, this is version 2 as you can see from the title. Go to my profile to find the first version (I'm too lazy to put the link here)