I can beat every day level (three stars) up to level 15 without grinding and without playing any night missions (though restart and skill adjustment needed). From 15 onwards the balance isn't so great. Please hurry up and make Cursed Treasure 3!
Most levels are pretty easy and I could just use the same strategy every time; except for the last. That one is really hard, and I needed items from the shop to complete it.
Fun game, could be developed further -as other players have said. The difficulty level is frustrating, and it would be helpful if you could earn some upgrade points even if you fail a level.
I don't like that I don't earn any points when I fail a level. I end up getting bored replaying the same easy levels the same way over and over again until I have enough points to try something new. .....This is a great game, though, just it would be more fun for me if I could keep trying at the hard levels until I pass them instead of always going back to the last ones for points.
I think the main problem with this game's balance is that the towers have such wide range it matters less about where and what type of towers and more about how many. So basically, once you know how to build up, all you need to do is keep placing more and more Heat Ray and Missile towers on the map. Gets boring.