It is a good game. Simple and easy. It would have been better if it is not linear. Few suggestion for next game.
1) There should be a few different dungeons setting with different bosses.
2) Too much grinding in the same setting might make people feel bored after some time.
3) Consider balancing the gameplay as I felt staff is a bit overpowered with that wave. Makes the boss fight literally a piece of cake.
4) Consider nerfing some flying type mobs' damage as daggers and sword users have difficulty hitting them compared to staff or perhaps adding aerial skill as dagger is the hardest to hit them.
Other than that, congratz on Daily 4th place and I hope there are more contents and enjoyment in the next game. Peace.