While I accept the ads at the end of the level, I would appreciate if the levels were much longer. Also, I would like it if the levels got harder. Maybe add division or make the multiplier an equation. Rather than simply 2x, you can 16x/8. Or have a timed area (rather than a gate) that could do more complex equations. So let's say the area has the equation x²-30. If <6 troops make it in, the difference creates red mobs and you hurt yourself. This game had potential that wasn't realized. Very sad