Nice game!
This feels like some old arcade game, especially with this limited palette and 8-bit-sounds ^^
Although it's a bit simple (Which is normal for this genre), it was really refreshing to see something in a style that no other submission has :D
The only improvement tips I could give are maybe change the control settings to more commonly used buttons (AD / Space or WAD f.e.) and add some more variety to the gameplay while still keeping it simplistic.
I actually like that there's no main menu or retry button, as this adds to the feeling of playing a fun retro game in an arcade
Overall, really cool game!