Good Game
Really fun game. I didn't like the fact that leveling up topped off at 50, yet that wasn't enough levels to fully upgrade everything. I expect to be able to max everything out instead of having a cap.
I beat the octopuss first while there was still one enemy house left and then I beat the enemy, but the level never ended. There were no enemy buildings or crystals left. After the octopus the last few levels are fairly easy.
For everyone having trouble with the bosses, especially the octopus, use magic. Upgrade fireball, meteor, and lighting. Also, upgrade the spell decrease time limit and crystal power. Then just keep spamming those spells at the head of the boss. Finally send start sending massive waves of troops in. It only takes one solider to make it to the head once the hp are at 0.
Overall a very fun game.