Brilliant! love the concept, art style and music - they all mesh very well together! I suffered from not understanding the bomb like everyone else but was great fun once I had that down.
Some other thoughts I had:
- It's not clear what actions in the game give you score - can I become a 1 and just run away forever to get a highscore? Or do I need to kill the enemies. Maybe the kills icon & count could be shown on the score screen to make this clear
- The best movement pattern is usually a circular motion around the horde of enemies. I think adding powerups or something else around the map to incentivize the player to move in different directions could create some more interesting situations for the player