This is the kind of mechanic that is in need of expansion.
First of all, I really like this game. The music and art fits the style you're going for. Nice job on adding a tutorial video.
Now here's some of my suggestions. They will not work on there own, but I believe they will work if you decide to expand upon the game in general.
- Clones should be able to pickup scores and powerups.
- Clones should be able to collide with each other
For the ideas above to work, you would need to rework the lives system and the overall goal of the game. It's just a suggestion, but I feel like this game would really shine with more complexity and mayhem.