I was thinking of creating an online version of a popular arcade game called Stacker. It's a very simple game, blocks slide back and forth across the screen and you have to stop the blocks at the same place on each row and build a stack up to the top.
The problem is if the game becomes popular, I'm afraid Stacker might sue me for stealing their idea. I've seen lawsuits over ideas in more complex games like computer games with full plots and gameplay, but would the same happen with something like Stacker? I see Tetris all over the place, which is somewhat similar in nature.
Also, I would not be calling the game Stacker if that makes a difference... it would have an original name.
Any info on the laws concerning this?