Feel free to remix it to use it, but please give credits to use it. This is useable in any device! You can move your mouse cursor to move like slither.io, or with mobile device, you can either click your finger where to move or hold your finger to keep moving real-time. You can just customize character, speed, background, etc.
Play ball game made by me! It uses this system. Link: https://scratch.mit.edu/projects/1206957701