I mean, it's breakout, like the others have said. Breakout is a good game, but as you did state, this is your first game, so let me try and be helpful with some pointers.
First thing I noticed is that the "You win" and "You lose" popup actually pops up in my browser as a notification, and I kind of hate that. Not entirely sure how you did it, but that's happening on my end, using firefox.
I notice the circle clipping through the blocks when it hits, maybe increase the circles hitbox by a little bit..
I mean, if you really want to endeavor to improve this, i'd just look at other breakout games and see what they got going because there's really nothing that can be added to breakout by now. I'd start with music, and a pause button, that should be simple enough. If you feel good, i'd add levels.
Just always remember the basics, and just keep improving. You can make it, mang.