This is a satisfying, casual, arcade-style game. The music's nice, the graphics are simple yet clean and consistent, and the sound effects make it satisfying to boop the enemies into oblivion. Also, it might just be my imagination, but I'm pretty sure you speed up over time, which is a nice touch (or just me being crazy). Either way, nice job!
For the bugs: If you click on the title a few times while it's loading, the song plays multiple times. I'm not sure where it's coming from, but I seem to take damage now and then, even when there's nothing on either side. Also, it can be a little frustrating not being able to see what's on the other side. Might be nice to have dim versions of those enemies so you can see what's coming.