A good addition! but too easy to play. Powerups are too common, making beating the game a breeze- Some powerups are a bit confusing, EMP's range is too large. I would make the energy pickups totally seperate from enemy drops, so that the player has to solve each level a little more. I had the most trouble with collision, and it seems the enemies get stuck too. Enlarging the map's corridors will help greatly as well.