First of all… I want to make a system for online that can detect where different and individual players, projectiles, npcs, non-projectile weapons, different damages, and without the scratch cloud refresh rate being weird. (+ multiserver) All of these are required for the game.
BUT ITS SO HARD!!!

wow you are trying to make an online game? thats so cool! I never made a online game, nor am i here to help. I just wanted to talk thats all…

Well thanks for the positive feedback, although… if you could refer somone who CAN help that'd be nice..

Ive only really seen online games work in a very offline type of way (Basically two players are using the same computer/keyboard to control two different sprites XD). Griffpatch made a multiplayer game but am sure its crazy hard. But best of luck!

Im not quite sure what online game you want to make like one with cloud variables or two on one keyboard and also could you share what you want to make? ‘Cause I don’t know what to help you with.

i remember my brother made an online game a few years back, he used cloud variables to send back and forth the co-ords to the other player. it was REALLY slow though. i don't know how possible it actually is, i know griffpatch did it with slither.io but that's griffpatch. Maybe try looking at his code to get some ideas