Copywrite Question- Can I use my art?

I would like to clone mechanics of an existing game, using the "Flying Along" template. I have added different gameplay features, such as spinning platforms and enemies, but the art style is very similar to this already existing game:

I'm using my own art, but can I face legal trouble if I publish a green-corridor, helicopter flying game?

As far as I know, you can be sued.

gameplay mechanics and rules cannot be copyrighted. Actual game assets are... so you can copy any game you want as long as you use your own art assets and music/sfx.