We are getting closer to the finish I think! The game is balanced enough that it’s possible to get past the first 10 levels. There are two power ups now to help along the way and they appear more frequently. One rebuilds the city and the other destroys *almost* all the enemies on the board.
Each bad guy has its own unique spin. The green ones are the standard but they move faster as the game goes on. Same with the reds but they go side to side. The orange are like the reds but tougher. The blue are slow but hard to kill. The gray ones are a like blues, but with a twist. The level 8 and 10 bosses are a bit of a surprise I think.