It's really a test, not a game.

What the hell does the thumbnail have to do with the game?

It's fine. It could be better . . . much better. Simple arcade game. Just not very "sticky" for a player because . . . well, that's all there is. Gotta start somewhere, right?
You didn't specify controls, not even in the author's comments. Just keep in mind that people need to know how to play your game and not guess. It doesn't really matter how common the game is. It's proper game design etiquette, that's all. Good luck . . . with life. I feel like you don't care much. But, have a good day, none-the-less.