happy cat by @Thorston5B check the studio out if u just want happy cat https://scratch.mit.edu/studios/28078173/
mechanics : background changes sometimes, u play as pico and u have to shoot him even tho he is not real, if u miss a note he gets closer, also this prob wont happen in the officla (cuz WAY to much coding) but u will be forced to use downscroll, at the end u wake up, but then it appears again,if he gets all the way close to u then you die