Fun game.
I tried to reach 5000 points, but gave up at 4750.
I think it could have been a lot more interesting with a lot fewer balls that spawned, the game nearly always last until the first wave reaches you as there is no way you can shoot yourself out. Which also makes the square mechanic a bit meaningless, as when you reach them you die immediatly.
The scale theme is a bit stretched in my opinion.
But still impressive what can be made in 4 days :)