Very clever usage of the theme =) 

The game idea is, good, designed well! The core mechanic is interesting. But the input bug, that sometimes prevents you from going in the direction you want to is really annoying.

Overall the game was good, with some really clever mechanics, such as defeating the enemies, but as Sopuisasopuli mentioned, the value blocked walls aren't exactly the best one. I had my fun, great job.

Interesting concept. I liked the method how to eliminate enemy game pieces and how the dice number affects to the score. Enough extra lives was also given for a number change. Still, consider adding a number changing element without depending on dying as it would make easier to avoid dead ends and game over.

Some bugs were present during the gameplay as the game would freeze for a short while randomly and each time when enemy fires. On the level 3 (after the first teleport/bonus level) you could get a dead end with the shootable wall. My dice number was 2 and the wall had 1.