Good game but with some significant flaws
I really enjoyed the hack-n-slash, the upgrades and level increases. Thumbs up!
... But much of the better equipment was just too expensive; I never bought anything more expensive than 10000.
I spent some money on soldiers, but while useful, they got killed quickly in the later stages since they never thought of running away. Also, I only once had enough crystals to buy a shredder.
The fortifications seemed a bit useless, I rarely had time to fix them - only at the end of a level I could run around from the remaining enemies and fix the fortifications while at it. But in the next level, after a little time for attacking the enemies, they soon broke through from all directions again.
Also, bugs when continuing a game: I always had to buy the potion of seeing again, and play around in the inventory so that the latest melee weapon and crossbow were indeed selected for switching with Q and E.
Perhaps it is better if spending money through MochiGames, but I think most of us don't...