Hey :D Great effort, I really like the dice mechanic, which has a load of potential for a game like this. I think you definitely need to speed everything up. The lasers I think should be a lot quicker, and same for the enemies - just ramp up that a bit and it will be a fun little shooter with a nice new mechanic.
One thing i think you need to address - make the scoring go in much higher increments. Only getting 1 point, for example, is kind of deflating. Maybe make a minimum score for a small ship like 50, and then pile on a 100 or 150 for different types, then a juicy bonus for the bosses. That way, when the high scores are achieved it feels much better to have 9000 points than 90, for example :D Just my opinion, but hopefully it helps haha
Nice work ;)