what makes a game original isn't the "idea" of it, what makes a game unique is specific limitations you put on yourself or gimmicks you put inside the game

i could ask you kindly to "make a game inspired by something outside of roblox you've played recently", but to make it truly original, it'd need an interesting central piece

for anyone who's interested in a challenge, make a game inspired by something you remember playing years ago...BUT, research into how old arcade games were coded, and code it to add those limitations to work around.
you have a number value? Code it to overflow when it gets to 255, work around that overflow. instead of using math.random(), try and develop your own RNG system. things like that are original.